Note 18 - Dividend Restriction (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Regulatory Dividend Restrictions, Prior Period Considered for Net Income	2 years
Regulatory Dividend Restrictions, Period Considered for Deduction of Dividend Already Paid for, Net Income	2 years
Subsidiaries [Member]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$ 50.5