Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Details)

v3.21.2
Revenue Recognition - Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]    
Deferred revenue $ 2,740 $ 3,302
Contract with Customer, Liability, Non-Cancellable Backlog $ 1,103  
Lease term 12 months  
Accounts receivable, net of allowances $ 3,121 3,224
Accounts Receivable, Net And Other Assets    
Disaggregation of Revenue [Line Items]    
Accounts receivable, net of allowances 3,245 $ 3,439
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01    
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, amount $ 443  
Remaining performance obligation, period 3 months  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01    
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, amount $ 1,055  
Remaining performance obligation, period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01    
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, amount $ 1,242  
Remaining performance obligation, period  
Minimum    
Disaggregation of Revenue [Line Items]    
Accounts receivable payment terms 30 days  
Maximum    
Disaggregation of Revenue [Line Items]    
Accounts receivable payment terms 90 days