(2) Finance Receivables (Details - Amortized Cost Basis) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Amortized cost basis	$ 186,745	$ 232,390
Vintage Pool 2012 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	92	131
Vintage Pool 2013 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	721	1,091
Vintage Pool 2014 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	4,877	6,881
Vintage Pool 2015 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	22,037	29,695
Vintage Pool 2016 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	61,259	76,728
Vintage Pool 2017 [Member]
Financing Receivable, Past Due [Line Items]
Amortized cost basis	$ 97,759	$ 117,864