Note 11 - Other Borrowings and Unused Lines of Credit - Wholesale Structured Repurchase Agreement Collateralized Investment Securities (Details) - Wholesale structured repurchase agreements - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Securities sold under repurchase agreements	$ 38,870,228	$ 40,503,002
Less: overcollateralized position	3,870,228	5,503,002
Assets sold	35,000,000	35,000,000
Residential Mortgage Backed Securities
Securities sold under repurchase agreements	$ 38,870,228	$ 40,503,002