Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings - USD ($)	Dec. 31, 2015	Apr. 30, 2015	Dec. 31, 2014
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	$ 110,000,000		$ 150,282,492
Wholesale Repurchase Agreements [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	$ 110,000,000		130,000,000
Term Note [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings		$ 15,275,000	17,625,000
Series A Subordinated Notes [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings			$ 2,657,492