Quarterly report pursuant to Section 13 or 15(d)

Revenue (Details) - Change in Contract Liability Balance

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Revenue (Details) - Change in Contract Liability Balance - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Revenue from Contract with Customer [Abstract]    
Beginning balance $ 2,455 $ 4,580
Revenue Recognized (1,737) (411)
Unearned consideration received 1,618
Ending Balance $ 2,336 $ 4,169