Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.7.0.1
Stock-Based Compensation - Additional Information (Detail)
1 Months Ended 3 Months Ended
May 31, 2014
$ / shares
shares
Mar. 31, 2017
USD ($)
stock_plan
shares
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of equity incentive plans | stock_plan   2  
Options granted maximum exercisable period (up to)   10 years  
Employees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested stock options granted | $   $ 2,862,783  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   2 years 6 months 7 days  
Non-Employee      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to non-vested stock options granted | $   $ 76,875  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)   9 months 4 days  
Dividend yield   0.00% 0.00%
Director      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of shares under stock options issued (in shares) | shares 200,000    
Exercise price of options exchanged (usd per share) | $ / shares $ 15.89    
2011 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future awards (in shares) | shares   758,101  
2008 Stock Option Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future awards (in shares) | shares   133,154  
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend yield   0.00%  
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)   1 year 7 months 17 days  
Unrecognized compensation cost | $   $ 315,049