Income Taxes - Rollforward of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Valuation Allowance [Roll Forward]
Balance at beginning of period	$ (2,718)	$ (2,484)	$ (2,477)
Additions of deferred income tax expense	(48)	(234)	(7)
Reductions of deferred income tax expense	0	0	0
Balance at end of period	$ (2,766)	$ (2,718)	$ (2,484)