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1. Summary of Significant Accounting Policies (Details Narrative) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 shares
Unrestricted cash balance	$ 12,787	$ 12,731
Other assets	$ 26,801	$ 23,397
Incremental shares excluded from EPS calculation | shares	10,300	7,500	7,900
CPS Leasing, Inc. [Member]
Ownership percentage in subsidiary	0.80
Repossessed Vehicles [Member]
Other assets	$ 8,900	$ 9,700
Dealer concentration [Member] | Geographic Concentration [Member] | OHIO
Concentration percentage	8.80%	7.40%
Dealer concentration [Member] | Geographic Concentration [Member] | CALIFORNIA
Concentration percentage	8.70%	7.10%
Dealer concentration [Member] | Geographic Concentration [Member] | NORTH CAROLINA
Concentration percentage	6.20%	5.80%
Dealer concentration [Member] | Geographic Concentration [Member] | FLORIDA
Concentration percentage	6.00%	5.90%
Dealer concentration [Member] | Geographic Concentration [Member] | INDIANA
Concentration percentage	5.20%	3.80%

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