Note 20 - Condensed Financial Statements of Parent Company - Condensed Statements of Operations (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest on loans, including fees	$ 14,834,648	$ 9,644,443
Interest income	16,761,606	11,318,519
Legal	291,550	162,917
Other professional services	1,046,450	383,125
Merger related expenses	219,417	899,606
Total noninterest expenses	13,236,828	10,260,558
Loss before income tax benefit and equity in net loss of bank subsidiary	(1,686,787)	329,075
Income tax benefit	(758,005)	421,691
Net loss	(928,782)	(92,616)
Parent Company [Member]
Interest on loans, including fees	30,464	16,086
Interest income	142,413	128,157
Legal	25,232	48,866
Other professional services	587	43,285
Merger related expenses	219,417	891,378
Other operating	171,516	232,680
Total noninterest expenses	416,752	1,216,209
Loss before income tax benefit and equity in net loss of bank subsidiary	(274,339)	(1,088,052)
Income tax benefit	(16,013)	(66,869)
Loss before equity in net loss of bank subsidiary	(258,326)	(1,021,183)
Equity in net (loss) income of bank subsidiary	(670,456)	928,567
Net loss	(928,782)	(92,616)
Parent Company [Member] | Bank Deposits [Member]
Interest income	5,307	7,139
Parent Company [Member] | Investment [Member]
Interest income	18,932	22,500
Parent Company [Member] | ESOP Loan [Member]
Interest income	$ 87,710	$ 82,432