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Schedule of Changes in Contract Liabilities (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Revenue from Contract with Customer [Abstract]  
Unearned revenue January 1, 2021 $ 1,132
Unearned billings 3,320
Revenue recognized (2,888)
Unearned revenue September 30, 2021 $ 1,564