Finance Receivables (Details - Amortized cost basis) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Amortized cost basis of finance receivables	$ 12,714	$ 27,553
Vintage Pool 2014 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis of finance receivables	137	370
Vintage Pool 2015 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis of finance receivables	721	1,788
Vintage Pool 2016 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis of finance receivables	3,270	7,673
Vintage Pool 2017 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis of finance receivables	$ 8,586	$ 17,722