Note 8 - 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] - USD ($)	Jun. 30, 2017	Mar. 31, 2017
Interest rate swaps related to FHLB Advances, notional amount	$ 11,550,000	$ 11,550,000
Interest rate swaps related to FHLB Advances, fair value	$ (209,948)	$ (83,634)