(9) Fair Value Measurements (Details - Delinquency status) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
FinanceReceivablesLineItems [Line Items]
Securitization Trust Debt [Member]	$ 1,594,070	$ 1,505,486
Initial Principal	1,698,110	1,668,076
Financial Asset, 30 to 59 Days Past Due [Member]
FinanceReceivablesLineItems [Line Items]
Initial Principal	58,534	96,296
Financial Asset, 60 to 89 Days Past Due [Member]
FinanceReceivablesLineItems [Line Items]
Initial Principal	20,114	36,436
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
FinanceReceivablesLineItems [Line Items]
Initial Principal	5,378	9,607
Repossessed Vehicles
FinanceReceivablesLineItems [Line Items]
Initial Principal	$ 20,014	$ 20,251