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Leases, Commitments and Contingencies - Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease cost $ 2,078 $ 1,037
Short-term lease cost 12 13
Variable lease cost 337 234
Total lease cost $ 2,427 $ 1,284