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Stockholders' Equity (Deficit) - Estimated Fair Value of Restricted Stock Award (Detail) - Unvested Restricted Stock Awards Excluded from EPS [Member] - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Shares Unvested, Beginning Balance 249,391    
Number of Shares, Granted 254,559    
Number of Shares, Vested (227,241)    
Number of Shares, Cancelled 0    
Number of Shares Unvested, Ending Balance 276,709 249,391  
Weighted Average Grant Date Fair Value Unvested, Beginning Balance $ 5.18    
Weighted Average Grant Date Fair Value, Granted 7.05 $ 4.0 $ 0
Weighted Average Grant Date Fair Value, Vested 5.62    
Weighted Average Grant Date Fair Value, Cancelled 0    
Weighted Average Grant Date Fair Value Unvested, Ending Balance $ 6.54 $ 5.18