Note 8 - Notes Payable - Schedule of Notes Payable at Face Value and Notes Payable to Related Parties (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Revolving credit facilities		$ 407,022	$ 389,707
Amortizing debt facilities		1,220	1,220
Notes payable to related parties		40,000	40,000
Total notes payable before unamortized debt issuance costs and discounts		454,800	437,900
Unamortized debt issuance costs and discounts		(6,600)	(7,000)
Total notes payable outstanding		$ 448,200	$ 430,900
Other Secured Debt [Member]
Amortizing securitization facility, maturity date		Sep. 08, 2023	Sep. 08, 2023
Amortizing debt facilities		$ 1,200	$ 1,200
Senior Secured Term Loan Facility [Member]
Amortizing securitization facility, maturity date	[1]	Nov. 21, 2019	Nov. 21, 2019
Notes payable to related parties	[2]	$ 40,000	$ 40,000
Revolving Credit Facility Expiring November 1, 2020 [Member]
Revolving credit facilities	[3],[4]	31,200	30,000
Revolving Credit Facility Expiring October 30, 2019 [Member]
Revolving credit facilities	[2],[4],[5]	49,600	49,900
Revolving Credit Facility Expiring February 8, 2022 [Member]
Revolving credit facilities	[2],[5],[6],[7]	69,000	61,000
Revolving Credit Facility Expiring June 11, 2020 [Member]
Revolving credit facilities	[2],[5],[6],[7]	80,500	80,500
Revolving Credit Facility Expiring November 16, 2020 [Member]
Revolving credit facilities	[2],[5],[6],[7]	16,000	8,000
Revolving Credit Facility Expiring November 15, 2023 [Member]
Revolving credit facilities	[2],[5],[6],[7]	$ 167,300	$ 167,300

[1] Loans are associated with variable interest entities.

[2] Loans are associated with variable interest entities.

[3] Loan is subject to certain affirmative covenants, including a coverage ratio, a leverage ratio and a collateral performance test, the failure of which could result in required early repayment of all or a portion of the outstanding balance by our CAR Auto Finance operations.

[4] These notes reflect modifications to either extend the maturity date, increase the loan amount or both, and are treated as accounting modifications.

[5] Loans are subject to certain affirmative covenants tied to default rates and other performance metrics the failure of which could result in required early repayment of the remaining unamortized balances of the notes.

[6] Creditors do not have recourse against the general assets of the Company but only to the collateral within the VIEs.

[7] See below for additional information.