Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 116	$ 116
Finance lease expense:
Amortization of leased assets	8	6
Interest on lease liabilities	1	0
Total finance lease cost	9	6
Total lease expense	$ 125	$ 122