Note 20 - Condensed Financial Statements of Parent Company - Condensed Statements of Financial Condition (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Assets
Cash and due from bank	$ 15,488,396	$ 24,436,793
Investment securities available-for-sale	75,404,136	102,429,128
Loans and leases, net of unearned income	387,598,982	336,738,383
Other assets	2,995,741	1,920,740
Total Assets	525,533,462	514,530,016
Liabilities	471,457,330	454,738,786
Shareholders' Equity
Common stock	34,076	34,111
Additional paid in capital	32,113,534	31,656,235
Retained earnings	25,920,490	31,730,673
Unearned ESOP shares	2,073,680	2,221,800
Accumulated other comprehensive loss	(1,918,288)	(1,407,989)
Total Shareholders' Equity	54,076,132	59,791,230	$ 61,544,583
Total Liabilities and Shareholders' Equity	525,533,462	514,530,016
Parent Company [Member]
Assets
Cash and due from bank	3,421,827	3,250,700
Investment securities available-for-sale	1,995,625	2,016,730
Loans and leases, net of unearned income	433,222	479,473
ESOP loan receivable	2,214,298	2,332,992
Investment in bank subsidiary	45,903,508	51,487,261
Other assets	107,652	224,074
Total Assets	54,076,132	59,791,230
Liabilities
Shareholders' Equity
Common stock	34,076	34,111
Additional paid in capital	32,113,534	31,656,235
Retained earnings	25,920,490	31,730,673
Unearned ESOP shares	2,073,680	2,221,800
Accumulated other comprehensive loss	(1,918,288)	(1,407,989)
Total Shareholders' Equity	54,076,132	59,791,230
Total Liabilities and Shareholders' Equity	$ 54,076,132	$ 59,791,230