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(2) Finance Receivables (Details - Amortized Cost Basis) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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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

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