(5) Interest Income and Interest Expense (Details - Interest expense) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Total interest expense	$ 16,400	$ 20,946
Securitization Trust Debt [Member]
Debt Instrument [Line Items]
Total interest expense	13,528	18,453
Warehouse lines of credit
Debt Instrument [Line Items]
Total interest expense	1,158	1,314
Residual interest financing [Member]
Debt Instrument [Line Items]
Total interest expense	1,094	566
Subordinated renewable notes [Member]
Debt Instrument [Line Items]
Total interest expense	$ 620	$ 613