Note 5 - Investment in Equity-method Investee - Summary of Equity-method Investee (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Loans, interest and fees receivables, at fair value	$ 3,232		$ 3,546
Total assets	3,407		3,732
Total liabilities	17		18
Members’ capital	3,390		$ 3,714
Net interest income, fees and related income on earning assets	342	$ 14
Net income (loss)	289	(61)
Equity in income of equity-method investees	$ 227	$ 9