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Leases Current and Noncurrent Lease Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease, liability, current $ 1,032 $ 1,068
Operating lease, liability, noncurrent 2,392 2,601
Operating lease, liability $ 3,424 $ 3,669