Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Schedule of Stock Option Activity (Detail)

v3.22.0.1
Stock Incentive Plan - Schedule of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares      
Beginning Balance 2,291,020    
Ending Balance 1,925,417 2,291,020  
Exercisable at end of period 924,292    
Weighted Average Exercise Price      
Ending Balance $ 3.01    
Weighted Average Remaining Contractual Term      
Contractual term 4 years 4 months 24 days    
Employee Stock Option [Member]      
Shares      
Beginning Balance 2,291,020 1,860,722  
Granted 270,000 743,000  
Exercised (475,657)    
Forfeited or expired (159,946) (312,702)  
Ending Balance 1,925,417 2,291,020 1,860,722
Exercisable at end of period 924,292 1,229,770  
Expected to Vest 950,568 1,007,657  
Weighted Average Exercise Price      
Beginning Balance $ 3.23 $ 4.39  
Granted 2.14 1.37  
Exercised 2.31    
Forfeited or expired 6.71 5.71  
Ending Balance 3.01 3.23 $ 4.39
Exercisable at end of period 4.25 4.37  
Expected to Vest 3.05 3.26  
Weighted Average Grant Date Fair value      
Beginning Balance 1.52 2.37  
Granted 1.55 0.35  
Exercised 1.08    
Forfeited or expired 4.70 3.80  
Ending Balance 1.37 1.52 $ 2.37
Exercisable at end of period 1.93 2.22  
Expected to Vest $ 1.38 $ 1.54  
Weighted Average Remaining Contractual Term      
Contractual term 4 years 4 months 24 days 4 years 3 months 18 days 3 years 7 months 6 days
Exercisable at end of period 2 years 4 months 24 days 2 years 4 months 24 days  
Expected to Vest 4 years 4 months 24 days 4 years 2 months 12 days  
Aggregate Intrinsic Value      
Exercised $ 728    
Ending Balance 1,310    
Exercisable at end of period 83    
Expected to Vest $ 1,248