Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Unrecognized Tax Benefits	$ 0
Unrecognized Tax Benefits, Period Increase (Decrease)	0
Loss Carryforwards, AMT Credit Carryovers	$ 225,294
Charitable Contribution Carryforwards, Limited Life	5 years
AMT Credit Carryovers, Limited Life	5 years
Operating Loss Carryforwards, Valuation Allowance	$ 42,364	$ 21,218
Operating Loss Carryforwards	11,200,000
Loss Carryforwards, Capital Loss	123,900
Loss Carryforwards, Charitable Contribution	$ 10,135
Fraternity Community Bancorp, Inc. [Member]
Operating Loss Carryforwards		$ 4,500,000
Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Date	Mar. 31, 2036
Latest Tax Year [Member] | Fraternity Community Bancorp, Inc. [Member]
Operating Loss Carryforwards, Expiration Date		Mar. 31, 2036
Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Date	Mar. 31, 2030
Earliest Tax Year [Member] | Fraternity Community Bancorp, Inc. [Member]
Operating Loss Carryforwards, Expiration Date		Mar. 31, 2030