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13. Fair Value Measurements (Details Narrative) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value Measurements Details Narrative    
Finance receivables related to reposessed vehicles in inventory $ 33,679 $ 40,069
Valuation adjustment, loss allowance $ 24,024 28,924
Recovery rate 29.00%  
Estimated fair value and carrying amount of repossed inventory $ 9,655 $ 11,145