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Schedule of Changes in Contract Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]    
Deferred revenue January 1 $ 1,132 $ 797
Unearned billings 3,373 3,163
Revenue recognized (2,992) (2,828)
Deferred revenue December 31 $ 1,513 $ 1,132