Note 17 - Related Party Transactions (Details Textual)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction, Amounts of Transaction	$ 0	$ 0	$ 0
Related Party Deposit Liabilities	$ 13,200,000	$ 10,400,000
Executive Officer [Member]
Number of Related Party Loans	1	1
Due to Related Parties	$ 8,000	$ 18,000
Director [Member]
Number of Related Party Loans		1
Due to Related Parties		$ 356,000