Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Cash flows from operating activities - operating leases	$ 389	$ 375
Cash flows from operating activities - finance leases	387	418
Cash flows from financing activities - finance leases	650	594
Operating lease right-of-use assets obtained in exchange for lease obligations	$ 322	$ 300