Note 11 - Derivative - Interest Rate Swap Agreement - Cash Flow Hedges Included in Consolidated Statements of Financial Condition (Details) - Liabilities [Member] - Interest Rate Swap [Member] - Cash Flow Hedging [Member]	Mar. 31, 2017 USD ($)
Interest rate swaps related to FHLB Advances, notional amount	$ 11,550,000
Interest rate swaps related to FHLB Advances, fair value	$ (83,634)