XML 35 R23.htm IDEA: XBRL DOCUMENT v3.4.0.3
Stock-Based Compensation - Additional Information (Detail)
3 Months Ended
Mar. 12, 2015
USD ($)
Director
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Mar. 31, 2015
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost | $     $ 1,621,000
Unvested option     920,468
Unrecognized compensation cost, recognition period     2 years
Weighted-average grant-date fair values of options granted | $ / shares   $ 1.05 $ 2.78
Number of options granted   277,500  
Number of options vested   69,375  
Stock-based compensation expense | $   $ 1,223,000 $ 935,000
Options vesting over 3 years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unvested option   208,125  
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards granted 81,352 0  
Restricted Stock | Non Employees Seven Board Of Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards granted 77,784    
Number of non-employee directors | Director 7    
Non-cash stock-based compensation expense to be recognized | $ $ 280,000    
Share based compensation, cliff vest in full date May 21, 2016    
Restricted Stock | Non Employees Two Board Of Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards granted 3,568    
Number of non-employee directors | Director 2    
Non-cash stock-based compensation expense to be recognized | $ $ 12,845    
Share based compensation, cliff vest in full date May 21, 2016    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options vesting period   3 years  
Stock-based compensation expense | $   $ 73,000