Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Additional Information (Detail)

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Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Feb. 28, 2021
Feb. 10, 2021
Oct. 29, 2019
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Basis Of Presentation [Line Items]                
Loss from operations         $ 16,431 $ 18,536 $ 15,621  
Working capital         35,500      
Cash and cash equivalents, including restricted cash         30,175 17,876 6,101 $ 8,356
Cash and cash equivalents         29,972 17,564    
Net accounts receivable         4,238 3,059    
Proceeds from issuance of common stock $ 13,300       13,300      
Proceeds from the exercise of common stock warrants         16,562 46  
Amount Received for Employee Retention Credit         1,800      
Prepaid expenses and other current assets         2,012 $ 3,018    
Equity raise of gross proceeds   $ 14,400 $ 4,200          
Refundable payroll tax credit           50.00%    
Increased credit       70.00%        
Cyber Incident                
Basis Of Presentation [Line Items]                
Prepaid expenses and other current assets         $ 400