Note 7 - Loans Receivable and Allowance for Loan Losses - Summary of Troubled Debt Restructurings (Details) - Legacy Loans [Member]	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Real Estate Loans [Member] | One-to four-family [Member] | Performing Financial Instruments [Member]
Troubled debt restructurings	$ 1,457,552	$ 1,366,132
Real Estate Loans [Member] | One-to four-family [Member] | Nonperforming Financial Instruments [Member]
Troubled debt restructurings	$ 101,449	$ 74,085
Real Estate Loans [Member] | One-to four-family [Member]
Number of contracts	12	5
Troubled debt restructurings	$ 1,559,001	$ 1,440,217
Real Estate Loans [Member] | Commercial [Member] | Performing Financial Instruments [Member]
Troubled debt restructurings		$ 3,358,446
Real Estate Loans [Member] | Commercial [Member] | Nonperforming Financial Instruments [Member]
Troubled debt restructurings	$ 2,717,144
Real Estate Loans [Member] | Commercial [Member]
Number of contracts	2	2
Troubled debt restructurings	$ 2,717,144	$ 3,358,446
Commercial Portfolio Segment [Member] | Performing Financial Instruments [Member]
Troubled debt restructurings	$ 647,654	614,358
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Troubled debt restructurings		$ 59,883
Commercial Portfolio Segment [Member]
Number of contracts	2	3
Troubled debt restructurings	$ 647,654	$ 674,241
Performing Financial Instruments [Member]
Troubled debt restructurings	2,105,206	5,338,936
Nonperforming Financial Instruments [Member]
Troubled debt restructurings	$ 2,818,593	$ 133,968
Number of contracts	16	10
Troubled debt restructurings	$ 4,923,799	$ 5,472,904