Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 464	$ 464
Finance lease expense:
Amortization of leased assets	26	15
Interest on lease liabilities	3	6
Total finance lease cost	29	21
Total lease expense	$ 493	$ 485