Note 6 - Purchase of Financial Assets (Details) - USD ($) $ in Thousands					12 Months Ended	20 Months Ended
	Feb. 27, 2015	Sep. 23, 2014	May. 12, 2014	Feb. 27, 2014	Dec. 31, 2015	Dec. 31, 2015
Transfers and Servicing [Abstract]
Loan Purchase Agreement, Financial Asset for Which Transfer is Accounted As a Purchase, Total Commitment to Purchase	$ 6,400	$ 18,100	$ 40,000		$ 50,000
Loan Purchase Agreement, Financial Asset for Which Transfer is Accounted As a Purchase, Par Value Purchased	6,400			$ 12,900		$ 66,700
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Interest Accrued	17	77
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Net Discount (Premium)	91	377				23,300
Payments for Loans	$ 6,500	18,500		$ 12,700		$ 43,400
Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds		$ 18,100
Loan Purchase Agreement, Transfer Of Financial Assets Accounted For As a Purchase, Maximum Monthly Loan Purchase			$ 4,000
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted As a Purchase Total Commitment to Purchase, Increase in Period					$ 10,000