Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Finance lease, operating cash flows	$ 38	$ 40	$ 75	$ 81
Finance lease, financing cash flows	27	21	54	44
Operating lease, operating cash flows	$ 786	$ 673	$ 1,566	$ 1,288