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Revenue Recognition - Summary of Table Represents a Rollforward of Deferred Contract Acquisition Costs (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Deferred Policy Acquisition Costs Disclosures [Abstract]          
Beginning balance $ 8,196 $ 5,989      
Additions to deferred contract acquisition costs 2,362 821      
Amortization of Deferred contract acquisition costs (978) (660)      
Ending balance 9,580 6,150      
Deferred contract acquisition costs (to be recognized in next 12 months)     $ 3,655 $ 3,247 $ 2,501
Deferred contract acquisition costs, noncurrent     5,925 4,949 3,649
Total deferred contract acquisition costs $ 9,580 $ 6,150 $ 9,580 $ 8,196 $ 6,150