Income Taxes, NOL and Tax Credit Carryforwards and Income Tax Uncertainties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Abstract]
Tax bad debt deduction under the new method	$ 4,300
Period for recapturing excess tax bad debt reserve into taxable income	4 years
Unrecognized tax benefits	$ 0	$ 0
Federal [Member]
Income Taxes [Abstract]
Net operating loss carryforwards	7,400
Net operating loss carryforwards with indefinite carryforward period	2,100
Net operating loss carryforwards going to expire if not utilized	5,300
Federal [Member] | General Business Tax Credit Carryforward [Member]
Income Taxes [Abstract]
Tax credit carryforward	2,000
California [Member]
Income Taxes [Abstract]
Net operating loss carryforwards with indefinite carryforward period	600
Net operating loss carryforwards going to expire if not utilized	$ 27,600