Note 14 - Income Taxes - Reconciliation of Provision for Taxes (Details) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Tax at statutory federal income tax rate	$ 111,886	$ (221,565)
Tax-exempt income	(133,030)	(160,891)
State income taxes, net of federal benefit	67,785	(2,419)
Nondeductible expenses and other	375,050	47,522
Income tax expense	$ 421,691	$ (337,353)