General form of registration statement for all companies including face-amount certificate companies

Other Current Liabilities - Additional Information (Detail)

v3.21.2
Other Current Liabilities - Additional Information (Detail) - USD ($)
$ in Thousands, shares in Millions
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Liability, Current $ 0 $ 558 $ 1
Number of shares (in shares)   12.3  
Payments for working capital liability 2,800    
Working capital, contract refund 3,900    
Working capital, accounts receivable adjustment $ 1,000    
Series C Convertible Preferred Stock Warrants [Member]      
Derivative Liability, Current     $ 8,500
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   8.3  
Number of shares (in shares)   0.2 1.0