Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Wholesale Structured Repurchase Agreement Collateralized Investment Securities - Wholesale Repurchase Agreements [Member] - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Less: overcollateralized position	$ 19,824,128	$ 23,757,514
	110,000,000	130,000,000
US Government Agencies Debt Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
U.S. govt. sponsored agency securities	$ 129,824,128	$ 153,757,514