Note 4 - Loans - Secured Loan Transactions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Receivables [Abstract]
Principal, beginning of period			$ 62,740	$ 71,017
Loans funded or acquired	$ 14,975	$ 3,383	61,745	24,363
Principal payments received	(21,621)	(11,403)	(38,255)	(27,345)
Loans sold to affiliates			(2,500)	(4,937)
Foreclosures			(345)	(16,312)
Other - loans charged off against allowance				(65)
Principal, end of period	$ 83,385	$ 46,721	$ 83,385	$ 46,721