Income Taxes, Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Effective income tax rate reconciliation [Abstract]
Statutory federal income tax benefit	$ 4,109	$ 3,324
State tax benefit, net of federal taxes	560	94
Foreign tax	(1)	(1)
Foreign deferred exchange rate adjustments	0	1,027
Dissolution of foreign subsidiary	0	(11,401)
Nondeductible/nontaxable items	(220)	34
Other	406	(255)
Valuation allowance (increase) decrease	(4,863)	7,169
Total income tax expense	$ (9)	$ (9)