(9) Income Taxes (Details - Tax rate effect) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Expense at federal tax rate	$ 24,401	$ 13,807	$ 4,225
State taxes, net of federal income tax effect	6,462	3,974	1,505
Stock-based compensation	(2,611)	(947)	35
Non-deductible expenses	1,056	1,129	974
Net operating loss carryback	0	(1,694)	(9,435)
Effect of change in tax rate	0	0	0
Accounting method change	0	0	0
Other	902	1,953	1,139
Income tax expense	$ 30,210	$ 18,222	$ (1,557)