(2) Finance Receivables (Details - Delinquency status) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total finance receivables with delinquency status	$ 668,449	$ 895,566
Financial Asset, 1 to 29 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, current	553,523	669,937
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	55,498	107,951
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	23,199	57,395
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	8,464	31,350
Repossessed Vehicles [Member]
Financing Receivable, Past Due [Line Items]
Finance receivables, past due	$ 27,765	$ 28,933