Note 14 - Income Taxes - Reconciliation of Provision for Taxes (Details) - USD ($)	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Tax at statutory federal income tax rate	$ (573,507)	$ 111,886
Tax-exempt income	(260,637)	(133,030)
State income taxes, net of federal impact	(90,427)	4,743
Nondeductible expenses and other	166,566	438,092
Income tax (benefit) expense	$ (758,005)	$ 421,691

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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