Note 9 - Premises and Equipment and Premises and Equipment Held For Sale (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016
Operating Leases, Rent Expense, Total	$ 511,884	$ 1,002,477
Newly Acquired Baltimore City Office [Member]
Lessee, Operating Lease, Renewal Term			5 years
Lease Agreement Related to Closed Branches [Member]
Operating Leases, Rent Expense, Total		$ 495,000