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Equity-based Compensation and Equity Incentive Plans - Additional Information (Detail) - USD ($)
12 Months Ended
Jan. 01, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value per share of options granted to employees   $ 2.42 $ 1.27  
Total fair value of awards vested   $ 2,800,000 $ 3,400,000  
Employee unrecognized compensation expense   $ 5,200,000    
Employee unrecognized compensation cost, period of recognition   2 years 7 months 6 days    
Equity-based compensation expense   $ 3,361,000 3,907,000  
Restricted Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total fair value of awards vested   800,000 $ 300,000  
Employee unrecognized compensation expense   $ 700,000    
Employee unrecognized compensation cost, period of recognition   3 years    
Granted   242,454 226,335  
Equity-based compensation expense   $ 334,000 $ 680,000  
Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock under employee stock purchase plan, Shares   42,653 29,857  
ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Increase in number of shares available for issuance (in shares) 381,832      
Percentage of discount for employees under ESPP   15.00%    
Purchase price as a percentage of fair value under ESPP   85.00%    
Equity-based compensation expense   $ 58,000 $ 27,000  
ESPP | Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock under employee stock purchase plan, Shares   42,653    
Plan 2015        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of shares outstanding       5.00%
Increase in number of shares available for issuance (in shares) 1,909,163