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Loan and Security Agreement - Additional Information (Detail) - Revolving Credit Facility [Member] - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]        
Credit facility borrowing capacity     $ 25,000,000.0  
Loan and Security Agreement [Member]        
Debt Instrument [Line Items]        
Revolving line of credit outstanding amount     $ 0  
Loan and Security Agreement [Member] | 2018 Loan Modification [Member]        
Debt Instrument [Line Items]        
Credit facility borrowing capacity       $ 11,000,000.0
Maximum percentage borrowings of eligible accounts receivable     80.00%  
Debt instrument, interest rate description     bore interest at one-half percent (0.5%) above the greater of 4.25% or the prime rate.  
Annual rate of accrued interest     0.50%  
Debt instrument interest rate during period minimum stated percentage     4.25%  
Maturity date   2020-05    
Loan and Security Agreement [Member] | 2020 Loan Agreement [Member]        
Debt Instrument [Line Items]        
Credit facility borrowing capacity $ 25,000,000.0   $ 25,000,000.0  
Maximum percentage borrowings of eligible accounts receivable 80.00%      
Debt instrument, interest rate description bear interest at the greater of 3.25% or the prime rate      
Debt instrument interest rate during period minimum stated percentage 3.25%      
Debt Instrument, Covenant Description the Company is required to maintain a financial performance covenant: a minimum asset coverage ratio of 1.5 to 1, calculated as the sum of unrestricted cash and qualified accounts receivable divided by borrowings outstanding under the revolving line of credit. Events which would meet the criteria of a default under the 2020 Loan Agreement include failure to make payments when due, insolvency events, failure to comply with covenants or material adverse events with respect to the Company.      
Maturity date 2022-08