Quarterly report pursuant to Section 13 or 15(d)

Stockholder's Equity (Tables)

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Stockholder's Equity (Tables)
 3 Months Ended
Mar. 31, 2018
Shareholders' equity  
Schedule of stock option activity

The following table summarizes stock option activity during the three months ended March 31, 2018: 

 

      Shares Underlying Options     Weighed Average Exercise Price     Weighted average Remaining Contractual Life (years)     Aggregate Intrinsic Value  
Outstanding at December 31, 2017       1,803,094     $ 4.41       9.19     $ 334  
Granted       94,000       4.58               —   
Exercised       (896 )     2.52             $  2  
Forfeited/canceled       (8,968 )     4.30                  
Outstanding at March 31, 2018       1,887,230     $ 4.42       9.04     $ 330  
Schedule of total non-cash stock-based compensation by operating statement classification

The following table sets forth total non-cash stock-based compensation by operating statement classification for the three months ended March 31, 2018 and 2017:

  

    Three Months ended March 31,  
    2018     2017  
Research and development   $ 68     $ 6  
Marketing     29       —  
General and administrative     505       647  
Total   $ 602     $ 653