Quarterly report pursuant to Section 13 or 15(d)

Revenue - Additional Information (Details)

v3.20.2
Revenue - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Disaggregation Of Revenue [Abstract]          
Revenue from usage-based fees in total revenue 98.00% 98.00% 98.00% 98.00%  
Revenue from term-based fees in total revenue 2.00% 2.00% 2.00% 2.00%  
Deferred revenue $ 1,500,000   $ 1,500,000   $ 1,400,000
Deferred revenue, revenue recognized $ 80,000   $ 1,000,000.0