Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.4.0.3
Stock-Based Compensation - Additional Information (Detail)
1 Months Ended 3 Months Ended
May. 31, 2014
$ / shares
shares
Mar. 31, 2016
USD ($)
stock_plan
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of equity incentive plans | stock_plan   2
Options granted maximum exercisable period   10 years
Stock appreciation rights   0
Restricted stock awarded   275,500
Employees    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to non-vested stock options granted | $   $ 4,165,630
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   2 years 10 months 6 days
Non-Employee    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to non-vested stock options granted | $   $ 112,875
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   1 year 9 months 4 days
Director    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Issuance of shares under stock options issued 200,000  
Exercise price of options exchanged | $ / shares $ 15.89  
2011 Equity Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares available for future awards   886,151
2008 Stock Option Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares available for future awards   111,455
Restricted shares of common stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   2 years 3 months 15 days
Unrecognized compensation cost | $   $ 629,524