Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Finance lease, operating cash flows	$ 38	$ 40	$ 113	$ 121
Finance lease, financing cash flows	27	23	81	67
Operating lease, operating cash flows	$ 813	$ 706	$ 2,379	$ 1,994