Note 10 - Goodwill and Other Intangible Asset - Activity in Goodwill and Acquired Intangible Assets Related to Branch Purchase (Details) - USD ($)			12 Months Ended
		Sep. 11, 2015	Mar. 31, 2016		Mar. 31, 2015
Core Deposits [Member]
Core deposit intangible, Balance			$ 138,333		$ 171,333
Amortization			(62,573)		(33,000)
Core deposit intangible, Balance			618,300		138,333
Finite-lived Intangible Assets Acquired		$ 543,000	542,540	[1]
Goodwill, Balance			2,664,432		2,664,432
Amortization			(62,573)		(33,000)
Goodwill, Balance			6,767,811		$ 2,664,432
Goodwill, Additions (1)	[1]		$ 4,103,379

[1] Additions to intangible assets are related to merger with Fairmount Bancorp, Inc.