(3) Finance Receivables (Details - Delinquency status) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total finance receivables with delinquency status	$ 491,307	$ 895,566
Financial Asset, 1 to 29 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, current	406,693	698,870
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	56,572	107,951
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	22,660	57,395
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	$ 5,382	$ 31,350