Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease expense	$ 513	$ 464	$ 464
Finance lease expense:
Amortization of leased assets	30	26	15
Interest on lease liabilities	3	3	6
Total finance lease expense	33	29	21
Total lease expense	$ 546	$ 493	$ 485