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Revenue Recognition (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]            
Deferred revenue         $ 1,600,000 $ 1,400,000
Deferred revenue recognized     $ 1,400,000 $ 1,100,000    
Current deferred revenue $ 1,489,000   1,489,000   1,642,000  
Noncurrent deferred revenue 0   0   0  
Contract assets 5,100,000   5,100,000   $ 1,500,000  
Remaining performance obligation 15,900,000   15,900,000      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01            
Disaggregation of Revenue [Line Items]            
Remaining performance obligation $ 8,600,000   $ 8,600,000      
Remaining performance obligation, expected timing of satisfaction 12 months   12 months      
Revenue Benchmark | Product Concentration Risk | Usage Based Revenue            
Disaggregation of Revenue [Line Items]            
Concentration risk percentage 89.00% 86.00% 88.00% 87.00%    
Revenue Benchmark | Product Concentration Risk | Subscription Revenue            
Disaggregation of Revenue [Line Items]            
Concentration risk percentage 11.00% 14.00% 12.00% 13.00%