5. Interest Income and Interest Expense (Details - Interest expense) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total interest expense	$ 26,991	$ 27,290
Securitization Trust Debt [Member]
Total interest expense	23,798	23,988
Warehouse Lines Of Credit [Member]
Total interest expense	1,763	2,020
Residual interest financing [Member]
Total interest expense	938	956
Subordinated Renewable Notes [Member]
Total interest expense	$ 492	$ 326