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Liabilities         Other accrued liabilities as of December 31, 2015 and December 31, 2014 consisted of the following (in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;padding:0pt;"> (in thousands) </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Compensation and benefits </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,072  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,852  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Professional fees </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>867  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,285  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Other </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,037  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,040  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,976  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,177  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> 2900000 1900000 1100000 <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;"> Patents         Costs to secure and defend patents are expensed as incurred and are classified as general and administrative expense in the Company's consolidated statements of operations. Patent expenses were approximately $1.1 million, $1.9 million, and $2.9 million for the years ended December 31, 2015, 2014 and 2013, respectively. </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> 0.03 0.03 19437000 4992000 12700000 0 0 0 19 P10D <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">         Other accrued liabilities as of December 31, 2015 and December 31, 2014 consisted of the following (in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> December 31, 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="5" valign="bottom" style="width:auto;padding:0pt;"> (in thousands) </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Compensation and benefits </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,072  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,852  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Professional fees </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>867  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,285  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Other </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,037  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,040  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,976  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,177  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> <div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;">         Stock-based compensation expense during the years ended December 31, 2015, 2014 and 2013 was as follows (in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Years ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Stock-based compensation expense by type of award: </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Employee stock options </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,060  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,076  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,757  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Restricted stock </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>240  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>355  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>273  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total stock-based compensation expense </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,300  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,431  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,030  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Effect of stock-based compensation expense by line item: </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Research and development </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,530  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,412  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,220  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> General and administrative </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,770  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,019  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,810  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total stock-based compensation expense included in net loss </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,300  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,431  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,030  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div> 1300000 0.05 10916667 21692753 21657369 5183333 1250000 7257142 37629000 37628000 1000 88942000 88940000 2000 36942000 36940000 2000 19437000 19436000 1000 4992000 4992000 12700000 12699000 1000 4.25 4.24 4.05 2.19

3139000

1299000

1285000

867000

20483000

42000

21145000

84000

4000

702694000

756633000

6030000

7431000

4300000

6030000

5757000

2810000

3220000

273000

7431000

7076000

3019000

4412000

355000

4300000

4060000

1770000

2530000

240000

6814417

45000

8829343

744514

10127257

426706

100675000

68195000

99346000

67775000

51662000

51666000

31604000

31608000

12000

5000

8000

1000

51666000

31608000

43000

42000

43000

126000

43000

44000

1000

81512000

48490000

46024000

34966000

46024000

45004000

1020000

45004000

1020000

34966000

27473000

7493000

27473000

7493000

97686000

97690000

66600000

66570000

66574000

0.0001

200000000

68930082

85232506

109120670

137788584

109120670

137788584

11000

14000

-90177000

-86174000

-68671000

0.0975

0.1335

108000

226985000

246550000

194091000

213004000

1427000

821000

2423000

2321000

21401000

22520000

7643000

7884000

226985000

246550000

413000

359000

314000

0.06

0.50

516000

673000

662000

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;"> (6) Stock-Based Compensation         The Company's 2006 Stock Plan provided for the grant of incentive stock options, non-statutory stock options and non-vested restricted stock to employees, officers, directors and consultants of the Company. In January 2015, the number of shares of common stock reserved for issuance under the 2006 Stock Plan was increased from 10,300,000 to 11,600,000 pursuant to an "evergreen" provision, which provides for an annual increase based on the lesser of 1,300,000 shares, 5% of the Company's then outstanding shares of common stock, or such other amount as the board of directors may determine. This increase was approved by the board of directors in December 2014. In June 2015, upon obtaining stockholder approval at its annual shareholder meeting, the Company implemented its new 2015 Stock Plan and reserved 8,741,000 shares of common stock for future issuance. In June 2015, the Company terminated its 2006 Stock Plan. The administration of these stock plans is under the general supervision of the compensation committee of the board of directors. The exercise price of the stock options is determined by the compensation committee of the board of directors, provided that incentive stock options are granted with an exercise price not less than fair market value of the common stock on the date of grant and expire no later than ten years from the date the option is granted. Options generally vest over four years. As of December 31, 2015, the Company had options outstanding to purchase 10,127,257 shares of its common stock, which includes options outstanding under its 2001 Stock Plan and 2006 Stock Plan that were terminated in March 2006 and June 2015, respectively. As of December 31, 2015, 8,067,115 shares were available for future issuance.         The following table summarizes stock option activity during the year ended December 31, 2015:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Shares </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted average exercise price </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted average remaining contractual life (years) </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Aggregate intrinsic value </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Outstanding at January 1 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8,829,343 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6.17 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Options granted </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,399,986 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.09 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Options cancelled </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(4,102,072 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4.76 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Options exercised </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Outstanding at December 31 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>10,127,257 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4.56 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5.29 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Exercisable at December 31 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,673,074 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6.17 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.09 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> </table></div>         The aggregate intrinsic value of all options outstanding and exercisable represents the total pre-tax amount, net of the exercise price, which would have been received by option holders if all option holders had exercised all options with an exercise price lower than the closing stock price of $0.35 on December 31, 2015, which was the last trading day of the year. The total intrinsic value of options exercised during the years ended December 31, 2015, 2014 and 2013 was approximately $0, $435,000 and $385,000, respectively. The total cash received by the Company as a result of stock option exercises during 2015, 2014 and 2013 was $0, $0.9 million and $1.1 million, respectively. The weighted-average grant date fair values of options granted during the years ended December 31, 2015, 2014 and 2013 were $1.51, $4.00 and $7.28, respectively. Non-Vested ("Restricted") Stock Awards with Service Conditions         The Company's share-based compensation plan provides for awards of restricted shares of common stock to employees, officers, directors and consultants to the Company. Restricted stock awards are subject to forfeiture if employment or service terminates during the prescribed retention period. Restricted shares vest over the service period. The total fair value of restricted stock that vested during the years ended December 31, 2015, 2014 and 2013 was $0.1 million, $0.1 million and $0.3 million, respectively. The following table summarizes unvested restricted share activity during the year ended December 31, 2015:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Shares </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted average grant date fair value </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Outstanding at January 1 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>744,514 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3.65 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Vested </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(71,211 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.72 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Granted </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>253,403 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.32 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Forfeited </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>(500,000 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;"> ) </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4.00 </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Outstanding at December 31 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>426,706 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.61 </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div> Stock-Based Compensation Expense         For the years ended December 31, 2015, 2014 and 2013, the fair value of each employee stock option award was estimated on the date of grant based on the fair value method using the Black-Scholes option pricing valuation model with the following weighted average assumptions:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Years ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Risk-free interest rate </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1.72  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1.88  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1.20  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Expected life in years </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 6.25 years </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 6.25 years </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> 6.25 years </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Volatility </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>84  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>104  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>102  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> % </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Expected dividend yield </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> — </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> </table></div>         Stock-based compensation expense during the years ended December 31, 2015, 2014 and 2013 was as follows (in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Years ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Stock-based compensation expense by type of award: </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Employee stock options </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,060  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,076  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>5,757  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Restricted stock </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>240  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>355  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>273  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total stock-based compensation expense </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,300  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,431  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,030  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Effect of stock-based compensation expense by line item: </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Research and development </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,530  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,412  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,220  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> General and administrative </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1,770  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>3,019  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2,810  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Total stock-based compensation expense included in net loss </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>4,300  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>7,431  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,030  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>         Unrecognized stock-based compensation expense as of December 31, 2015 was as follows (dollars in thousands):                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Unrecognized stock compensation expense as of December 31, 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Weighted average remaining period (in years) </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Employee stock options </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,087  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.98  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Restricted stock </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>893  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>1.93  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Total </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> $ </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,980  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>2.84  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

-1.27

-0.28

-0.87

-0.24

-0.19

-0.53

-0.15

-0.13

-0.08

<div> <div style="margin-left:0%;margin-right:0%;"></div><div style="margin-left:0%;margin-right:0%;"> Basic and Diluted Loss Per Common Share         Basic net loss per share is computed using the weighted average number of common shares outstanding during the period, excluding restricted stock that has been issued but is not yet vested. Diluted net loss per common share is computed using the weighted average number of common shares outstanding and the weighted average dilutive potential common shares outstanding using the treasury stock method. However, for the years ended December 31, 2015, 2014 and 2013, diluted net loss per share is the same as basic net loss per share as the inclusion of weighted average shares of unvested restricted common stock and common stock issuable upon the exercise of stock options would be anti-dilutive.         The following table summarizes outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive for the years ended December 31, 2015, 2014 and 2013, respectively:                                                                                                                                                                                      <div style="width:100%;"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 80.00%;CellSpacing:0;margin-left:0pt;"> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="8" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> Years Ended December 31, </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2015 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2014 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> <td colspan="2" valign="bottom" style="width:auto;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:auto;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;"> Common stock options </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>10,127,257  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>8,829,343  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>6,814,417  </td> <td valign="bottom" style="width:auto;background-color: #CCEEFF;padding:0pt;">   </td> </tr> <tr style="CellSpacing:0;"> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;"> Unvested restricted stock </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>426,706  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>744,514  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;;font-family:Times;font-size:10pt;text-align:right;" nowrap="nowrap"><div style="float:left"></div>45,000  </td> <td valign="bottom" style="width:auto;background-color: #FFFFFF;padding:0pt;">   </td> </tr> </table></div>   </div><div style="margin-left:0%;margin-right:0%;"> </div><div style="margin-left:0%;margin-right:0%;"></div> </div>

3852000

3072000

1100000

900000

6980000

6087000

893000

P2Y10M2D

P2Y11M23D

P1Y11M5D

15699000

5324000

15746000

2940000

3241000

4241000

4150000

13392000

3127000

2981000

3134000

29878000

26917000

19565000

5252000

6243000

5099000

-30665000

-29293000

-23348000

1118000

1094000

1229000

-47000

101000

96000

-3735000

-3342000

-2569000

2462000

1720000

1282000

928000

-3450000

-1840000

591000

459000

-1201000

951000

-111000

-305000

-21000

-102000

-455000

2500000

127000

2100000

59000

1100000

42000

-2633000

-650000

-2210000

-585000

-517000

-458000

-375000

-1061000

-296000

-234000

-156000

2512000

1875000

957000

35539000

17788000

100675000

68195000

30889000

17788000

4650000

4500000

107000

-33022000

-2466000

-11058000

69042000

85296000

40386000

-24653000

-8837000

20000000

-77411000

-78925000

-71444000

-90192000

-23557000

-86161000

-22286000

-19966000

-20352000

-20707000

-68671000

-19800000

-17628000

-10536000

87559000

22907000

83951000

21701000

19449000

19894000

20332000

67610000

19504000

17394000

10380000

-87559000

-22907000

-83951000

-21701000

-19449000

-19894000

-20332000

-67610000

-19504000

-17394000

-10380000

2020000

1995000

25000

2200000

2300000

2400000

578100000

321900000

1040000

1037000

305000

15000

-13000

1300000

2600000

1200000

1500000

100000

114151000

93845000

117135000

769000

144000

58000

0.0001

5000000

1656000

1201000

38735000

89796000

36942000

600000

2000000

13500000

12900000

57100000

27300000

5000000

33600000

39200000

5600000

22500000

41900000

7700000

90267000

85152000

137193000

1000000

21507000

3126000

12217000

1176000

4988000

21565000

3136000

12217000

1182000

5030000

1024000

84000

420000

42000

P7Y

P3Y