Note 11 - Other Borrowings and Unused Lines of Credit - Wholesale Structured Repurchase Agreement Collateralized Investment Securities (Details) - Whole sale Repurchase Agreements [Member] - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Securities sold under repurchase agreements	$ 52,119,731	$ 129,824,128
Less: overcollateralized position	7,119,731	19,824,128
	45,000,000	110,000,000
US Government Agencies Debt Securities [Member]
Securities sold under repurchase agreements	20,798,703	129,824,128
Residential Mortgage Backed Securities [Member]
Securities sold under repurchase agreements	$ 31,321,028