Components of Lease Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease expense	$ 116	$ 116	$ 232	$ 232
Finance lease expense:
Amortization of leased assets	9	6	17	12
Interest on lease liabilities	1	1	2	2
Total finance lease expense	10	7	19	14
Total lease expense	$ 126	$ 123	$ 251	$ 246