Quarterly report pursuant to Section 13 or 15(d)

Stockholder's Equity (Tables)

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Stockholder's Equity (Tables)
6 Months Ended
Jun. 30, 2018
Shareholders' equity  
Schedule of warrants to purchase common stock activity

A summary of the Company’s warrants to purchase common stock activity is as follows:

 

      Shares Underlying Warrants     Weighted Average Exercise Price     Weighted average Remaining Contractual Life (years)     Aggregate Intrinsic Value  
Outstanding at December 31, 2017       1,340,869     $ 5.07       3.73     $  
Granted       1,105,682       5.00                  
Outstanding at June 30, 2018       2,446,551     $ 5.04       3.87     $ 5,265
Schedule of stock option activity

The following table summarizes stock option activity during the six months ended June 30, 2018:

 

      Shares Underlying Options     Weighted 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       152,000     $ 4.50                  
Exercised       (896 )   $ 2.52             $ 2  
Forfeited/canceled       (46,388 )   $ 4.69                  
Outstanding at June 30, 2018       1,907,810     $ 4.41       8.76     $ 5,310  
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 and six months ended June 30, 2018 and 2017:

 

    Three Months ended June 30     Six Months ended June 30,  
    2018     2017     2018     2017  
Research and development   $ 35     $ 42     $ 103     $ 48  
Sales and marketing     10       37       39       37  
General and administrative     426       (135 )     931       512  
Total   $ 471     $ (56 )   $ 1,073     $ 597