Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings (USD $)	Dec. 31, 2014	Dec. 31, 2013
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	$ 150,282,492	$ 142,448,362
Wholesale Repurchase Agreements [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	130,000,000	130,000,000
Term Note [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	17,625,000	9,800,000
Series A Subordinated Notes [Member]
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items]
Other borrowings	$ 2,657,492	$ 2,648,362