XML 52 R40.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock Incentive Plans - Stock Option Plan Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Stock options          
Outstanding at beginning of year (in shares)     2,270,169    
Granted (in shares)     825,640    
Exercised (in shares)     (22,879)    
Cancelled or forfeited (in shares)     (271,080)    
Outstanding at end of year (in shares) 2,801,850   2,801,850   2,270,169
Vested and Exercisable to vest at end of year (in shares) 1,024,156   1,024,156    
Weighted-Average Exercise Price          
Outstanding at beginning of year (in dollars per share)     $ 6.11    
Granted (in dollars per share)     1.24    
Exercised (in dollars per share)     1.01    
Cancelled or forfeited (in dollars per share)     7.20    
Outstanding at end of year (in dollars per share) $ 4.61   4.61   $ 6.11
Vested and Exercisable at end of year (in dollars per share) $ 5.86   $ 5.86    
Weighted Average Remaining Contractual Term (years)          
Outstanding at end of year     8 years 2 months 12 days   8 years 1 month 21 days
Vested and Exercisable at end of year     6 years 7 months 28 days    
Aggregate Intrinsic Value          
Outstanding at the beginning of the year     $ 613    
Outstanding at the end of the year $ 139   139   $ 613
Stock options          
Unrecognized stock-based compensation expense          
Intrinsic value of options exercised 14 $ 32 41 $ 200  
Fair value of options vested $ 600 $ 600 $ 1,200 $ 1,100  
Weighted average grant date fair value of options granted (in dollars per share) $ 0.94 $ 3.09 $ 0.84 $ 2.96  
Unrecognized compensation expense related to unvested stock option awards $ 4,100   $ 4,100    
Weighted-average amortization period over which cost is expected to be recognized     2 years 3 months 18 days