Note 4 - Borrowings - Maturity and Interest Rate Information On Advances From FHLB (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Federal Home Loan Bank, Advances, Putable Option [Member] | Weighted Average [Member]
Total FHLB advances		3.17%
Federal Home Loan Bank, Advances, Putable Option [Member]
2016		$ 2,000,000
2016		4.00%
2017
2017
2018		$ 5,000,000
2018		2.84%
Total FHLB advances		$ 7,000,000
Total FHLB advances
Weighted Average [Member]
Total FHLB advances		1.37%
2016	$ 90,300,000	$ 103,000,000
2016	0.55%	0.56%
2017	$ 23,342,549	$ 18,000,000
2017	2.59%	2.89%
2018	$ 25,000,000	$ 30,000,000
2018	2.70%	3.27%
Total FHLB advances	$ 138,642,549	$ 151,000,000
Total FHLB advances	1.68%