Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Cash flows from operating activities - operating leases	$ 586	$ 552
Cash flows from operating activities - finance leases	574	622
Cash flows from financing activities - finance leases	993	907
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 486	$ 455