Leases - Supplemental Cash Flows (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities    
Operating cash outflows from operating leases $ 481 $ 429
Operating cash outflows from finance leases 7 19
Financing cash outflows from finance leases 163 224
ROU assets obtained in exchange for new lease liabilities    
Operating leases 0 355
Finance leases $ 0 $ 0