Fair Value Measurements (Details - Fair values) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	$ 9,752	$ 6,174
Restricted cash and equivalents	256,859	119,257
Finance receivables, net	10,326	20,848
Accrued interest receivable	129	292
Warehouse lines of credit	82,175	234,025
Residual interest financing	99,079
Accrued interest payable	8,473	7,928
Securitization trust debt	2,711,060	2,183,331
Subordinated renewable notes	22,356	17,188
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	9,752	6,174
Restricted cash and equivalents	256,859	119,257
Finance receivables, net	0	0
Accrued interest receivable	0	0
Warehouse lines of credit	0	0
Accrued interest payable	0	0
Securitization trust debt	0	0
Subordinated renewable notes	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	0	0
Restricted cash and equivalents	0	0
Finance receivables, net	0	0
Accrued interest receivable	0	0
Warehouse lines of credit	0	0
Accrued interest payable	0	0
Securitization trust debt	0	0
Subordinated renewable notes	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	0	0
Restricted cash and equivalents	0	0
Finance receivables, net	10,326	20,848
Accrued interest receivable	129	292
Warehouse lines of credit	82,175	234,025
Residual interest financing	99,079
Accrued interest payable	8,473	7,928
Securitization trust debt	2,711,060	2,183,331
Subordinated renewable notes	22,356	17,188
Carrying Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	9,752	6,174
Restricted cash and equivalents	256,859	119,257
Finance receivables, net	12,030	24,684
Accrued interest receivable	129	292
Warehouse lines of credit	82,175	234,025
Residual interest financing	99,079
Accrued interest payable	8,473	7,928
Securitization trust debt	2,736,225	2,265,446
Subordinated renewable notes	$ 22,356	$ 17,188