Note 20 - Condensed Financial Statements of Parent Company - Condensed Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net loss	$ (928,782)	$ (92,616)
Increase in other assets	2,565,464	377,626
Decrease in other liabilities	(1,642,208)	68,564
Net cash provided by operating activities	543,965	1,395,146
Acquisition, net of cash acquired	(10,508,813)	(12,723,871)
Loans made, net of principal repayments	(10,461,510)	(8,018,865)
Proceeds from maturing and called certificates of deposit	1,724,000	514,510
Proceeds from maturing and called securities available for sale, including principal pay downs	28,963,565	21,322,394
Purchase of investment securities available-for-sale	(50,585,898)	(8,020,125)
Net cash used by investing activities	(34,822,132)	12,699,120
Issuance of restricted stock	20
Redemption of restricted stock	(69,068)	(63,010)
Net cash provided by financing activities	(3,816,448)	36,710,382
Net decrease in cash and cash equivalents	(38,094,615)	50,804,648
Cash and cash equivalents at beginning of period	67,448,536	16,643,888
Cash and cash equivalents at end of period	29,353,921	67,448,536
Parent Company [Member]
Net loss	(928,782)	(92,616)
Equity in undistributed net (loss) income of subsidiary	670,456	(928,567)
Amortization of premium on investment securities	4,707
Increase in other assets	(9,593)	(96,962)
Decrease in other liabilities	(23,976)	(51,458)
Net cash provided by operating activities	(287,188)	(1,169,603)
Acquisition, net of cash acquired	(22,430,749)	(13,804,370)
Principal collected on ESOP loan	116,819	115,409
Loans made, net of principal repayments	153,313	23,146
Proceeds from maturing and called certificates of deposit		264,510
Proceeds from maturing and called securities available for sale, including principal pay downs	1,000,000
Purchase of investment securities available-for-sale	(2,026,900)
Net cash used by investing activities	(23,187,517)	(13,401,305)
Dividend from Bank subsidiary	24,000,000	10,000,000
Dividend to Bank subsidiary	(3,000,000)
Issuance of restricted stock	20
Redemption of restricted stock	(45)
Net cash provided by financing activities	20,999,975	10,000,000
Net decrease in cash and cash equivalents	(2,474,730)	(4,570,908)
Cash and cash equivalents at beginning of period	5,725,430	10,296,338
Cash and cash equivalents at end of period	$ 3,250,700	$ 5,725,430