Note 8 - Derivative - Interest Rate Swap Agreement (Tables)

6 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

	September 30, 2017					March 31, 2017
	Notional					Notional
	Amount		Fair Value			Amount		Fair Value
Included in liabilities:
Interest rate swaps related to FHLB Advances	$	11,550,000	$	(186,917	)	$	11,550,000	$	(83,634	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Six-Month and Period Ended September 30, 2017
	Amount of Gain			Amount of Gain		Amount of Gain
	(Loss) Recognized			(Loss) Reclassified		(Loss) Recognized in
	in OCI			from OCI to		Other Noninterest Income
	(Effective Portion)			Interest Income		(Ineffective Portion)
Interest Rate Contracts	$	(183,238	)	$	-	$	(3,679	)

Fair Value Hedging [Member]

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

	September 30, 2017						March 31, 2017
	Notional Amount		Principal Amount		Fair Value		Notional Amount		Principal Amount		Fair Value
Included in loans and leases:
Commercial real estate loan	$	-	$	3,134,403	$	3,171,879	$	-	$	3,175,044	$	3,201,691
Included in other liabilities:
Interest rate swap	$	3,134,403		-	$	37,476	$	3,175,044		-	$	26,647

Cash Flow Hedging [Member]

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

	Notional		Effective		Pay Fixed			Receive
Interest Rate Swap	Amount		Start Date	Maturity Date	Rate			Floating Rate
FHLB Advance Swap 1	$	1,850,000	March 9, 2017	March 9, 2022		2.24	%	3-Month LIBOR
FHLB Advance Swap 2		1,850,000	March 9, 2017	March 9, 2024		2.41	%	3-Month LIBOR
FHLB Advance Swap 3		1,850,000	March 9, 2017	March 9, 2027		2.57	%	3-Month LIBOR
FHLB Advance Swap 4		2,000,000	March 29, 2017	March 29, 2022		2.08	%	3-Month LIBOR
FHLB Advance Swap 5		2,000,000	March 29, 2017	March 29, 2024		2.24	%	3-Month LIBOR
FHLB Advance Swap 6		2,000,000	March 29, 2017	March 29, 2027		2.40	%	3-Month LIBOR
	$	11,550,000