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Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Feb. 10, 2021
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Basis Of Presentation [Line Items]          
Series F Preferred stock, shares issued   0 1,000    
Proceeds From Issuance Of Common Stock $ 14,400 $ 13,292      
Proceeds from the exercise of common stock warrants   16,539 $ 1,500    
Cash, cash equivalents, and restricted cash   41,046 17,876 $ 1,823 $ 6,101
Accounts receivable, net   3,266 $ 3,059    
Equity raise of gross proceeds $ 14,400        
SWK Loan          
Basis Of Presentation [Line Items]          
Working capital   $ 46,500