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Revenue - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Contract with customer, liability $ 10,357 $ 9,324
Deferred revenue, revenue recognized 3,325 1,017
Cumulative catch-up adjustment to revenue, modification of contract   2,500
Revenue, remaining performance obligation $ 277 $ 578