(5) Interest Income and Interest Expense (Details - Interest expense) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Total interest expense	$ 18,771	$ 18,980	$ 35,171	$ 39,925
Securitization Trust Debt [Member]
Debt Instrument [Line Items]
Total interest expense	15,745	16,823	29,273	35,276
Warehouse lines of credit
Debt Instrument [Line Items]
Total interest expense	1,386	1,021	2,544	2,335
Residual interest financing [Member]
Debt Instrument [Line Items]
Total interest expense	1,050	467	2,144	1,033
Subordinated renewable notes [Member]
Debt Instrument [Line Items]
Total interest expense	$ 590	$ 669	$ 1,210	$ 1,281