Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Contracts with Customer (Details)

v3.20.4
Revenue Recognition - Contracts with Customer (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Contract assets $ 4,526 $ 1,027
Unbilled receivables 10,942 10,099
Contract costs 90 0
Contract liabilities: deferred revenue $ 4,791 $ 2,044