Quarterly report pursuant to Section 13 or 15(d)

Stock Option and Incentive Plans - Additional Information (Detail)

v3.7.0.1
Stock Option and Incentive Plans - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Feb. 26, 2016
Dec. 31, 2015
Feb. 26, 2013
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Jul. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares of common stock reserved pursuant to the plan       26,242,224   31,906,521  
Weighted average period of unvested stock options       2 years 11 months 1 day      
Weighted average grant date fair value of options       $ 1.75 $ 3.39    
Unrecognized compensation cost related to unvested stock options       $ 2,941,432      
Employee Stock Options [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation expense recognized       $ 380,911 $ 1,080,806    
Amended and Restated 2008 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares of common stock reserved pursuant to the plan     1,571,428        
Termination of service, Period     2 years        
2008 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Termination of service, Period 10 years            
2014 Omnibus Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares of common stock reserved pursuant to the plan             571,429
Number of additional shares increases of common stock reserved pursuant to the plan           1,907,307  
2014 Omnibus Incentive Plan [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Annual increase of plan, percentage of common stock shares outstanding   4.00%