Note 7 - Loans Receivable and Allowance for Loan Losses - Number of Contracts and Outstanding Loan Balance At Time of Modification (Details) - Real Estate Loans [Member] - Residential [Member]	12 Months Ended
Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Outstanding recorded investment	$ 97,401	$ 147,578
Number of contracts	3	7

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Balance Type:	debit
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