Note 3 - Segment Reporting - Summary of Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Consumer loans, including past due fees	$ 50,390	$ 35,681
Other	69	45
Total interest income	50,459	35,726
Interest expense	(11,146)	(8,153)
Net interest income before fees and related income on earning assets and provision for losses on loans, interest and fees receivable	39,313	27,573
Fees and related income on earning assets	11,264	6,214
Servicing income	2,060	1,148
Equity in income of equity-method investees	227	9
Income before income taxes	5,893	(4,575)
Income tax benefit (expense)	(238)	(144)
Total assets	636,234	432,912	$ 582,608
Assets, Total	636,234	432,912	$ 582,608
Servicing Income [Member]
Servicing income	686	632
Credit and Other Investments [Member]
Consumer loans, including past due fees	42,672	28,562
Other	69	45
Total interest income	42,741	28,607
Interest expense	(10,769)	(7,892)
Net interest income before fees and related income on earning assets and provision for losses on loans, interest and fees receivable	31,972	20,715
Fees and related income on earning assets	11,236	6,197
Servicing income	1,776	871
Equity in income of equity-method investees	227	9
Income before income taxes	4,207	(6,914)
Income tax benefit (expense)	239	399
Total assets	557,281	365,882
Assets, Total	557,281	365,882
Credit and Other Investments [Member] | Servicing Income [Member]
Servicing income	419	402
Auto Finance [Member]
Consumer loans, including past due fees	7,718	7,119
Other
Total interest income	7,718	7,119
Interest expense	(377)	(261)
Net interest income before fees and related income on earning assets and provision for losses on loans, interest and fees receivable	7,341	6,858
Fees and related income on earning assets	28	17
Servicing income	284	277
Equity in income of equity-method investees
Income before income taxes	1,686	2,339
Income tax benefit (expense)	(477)	(543)
Total assets	78,953	67,030
Assets, Total	78,953	67,030
Auto Finance [Member] | Servicing Income [Member]
Servicing income	$ 267	$ 230