Income Taxes, Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Uncertain Tax Positions [Roll Forward]
Balance at beginning of year	$ 13	$ 13
Additions for positions taken in prior years	0	0
Reductions for positions taken in prior years	0	0
Balance at end of year	13	13
Interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0