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Share-Based Payment Awards - Employee Stock Purchase Plan - Additional Information (Detail) - USD ($)
 12 Months Ended
Jun. 25, 2019
Dec. 31, 2021
Dec. 31, 2020
Jun. 22, 2021
Class Of Stock [Line Items]        
Employee stock purchase plan   $ 273,000 $ 294,000  
Common stock, shares issued   33,905,826 18,139,981  
Stock-based compensation expense   $ 7,447,000 $ 5,547,000  
ESPP [Member]        
Class Of Stock [Line Items]        
Number of common stock, authorized for issuance 110,000     250,000
Price of common stock purchased twice a year under ESPP, percent 85.00%      
Employee stock purchase plan $ 25,000      
Employee stock purchase plan, shares 5,000      
Consecutive six month offering period Aug. 01, 2019      
Common stock, shares issued   43,365    
Stock-based compensation expense   $ 113,000