Quarterly report pursuant to Section 13 or 15(d)

Stock Option and Incentive Plans - Additional Information (Detail)

v3.21.1
Stock Option and Incentive Plans - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 01, 2021
Dec. 31, 2015
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jul. 28, 2014
Apr. 29, 2014
Feb. 24, 2014
Feb. 26, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares of common stock reserved pursuant to the plan     15,304,915   14,245,213        
Weighted average grant date fair value of options     $ 5.58 $ 10.78          
Unrecognized compensation cost related to unvested stock options     $ 5.1            
Weighted average period of unvested stock options     2 years 7 months 17 days            
Employee Stock Options [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Compensation expense recognized     $ 0.6 $ 0.6          
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                 157,143
Termination of service, Period     2 years            
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             235,714 185,714  
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           57,143      
Number of additional shares increases of common stock reserved pursuant to the plan 2,695,373                
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%