Note 6 - Purchase of Financial Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended	32 Months Ended
	Dec. 31, 2016	Dec. 31, 2016
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Total Commitment to Purchase	$ 50.0
Loan Purchase Agreement Financial Asset for Which Transfer is Accounted as a Purchase Par Value Purchased		$ 95.9
Loan Purchase Agreement Financial Asset for Which Transfer Is Accounted as a Purchase Net Discount Premium		48.9
Payments for Loans		$ 47.0