Note 7 - Derivative - Interest Rate Swap Agreement (Tables)

6 Months Ended

Sep. 30, 2018

Notes Tables

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

	September 30, 2018				March 31, 2018
	Notional				Notional
	Amount		Fair Value		Amount		Fair Value
Included in assets:
Interest rate swaps related to FHLB Advances	$	11,550,000	$	412,230	$	11,550,000	$	217,464

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

Three Month and Period Ended September 30, 2018

Three Month and Period Ended September 30, 2017

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

(Loss) Recognized

(Loss) Reclassified

(Loss) Recognized in

(Loss) Recognized

(Loss) Reclassified

(Loss) Recognized in

in OCI

from OCI to

Other Noninterest Revenue

in OCI

from OCI to

Other Noninterest Revenue

(Effective Portion)

Interest Income

(Ineffective Portion)

(Effective Portion)

Interest Income

(Ineffective Portion)

Interest Rate Contract

$

95,806

$

-

$

540

$

26,710

$

-

$

(3,679

)

Six Month and Period Ended September 30, 2018

Six Month and Period Ended September 30, 2017

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

Amount of Gain

(Loss) Recognized

(Loss) Reclassified

(Loss) Recognized in

(Loss) Recognized

(Loss) Reclassified

(Loss) Recognized in

in OCI

from OCI to

Other Noninterest Revenue

in OCI

from OCI to

Other Noninterest Revenue

(Effective Portion)

Interest Income

(Ineffective Portion)

(Effective Portion)

Interest Income

(Ineffective Portion)

Interest Rate Contract

$

193,845

$

-

$

921

$

(183,238

)

$

-

$

(3,679

)

Fair Value Hedging [Member]

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

	September 30, 2018						March 31, 2018
	Notional Amount		Principal Amount		Fair Value		Notional Amount		Principal Amount		Fair Value
Included in Loans and Leases:
Commercial real estate loan	$	-	$	3,049,540	$	2,927,163	$	-	$	3,091,892	$	3,022,744
Included in Other Assets:
Interest Rate Swap	$	3,049,540	$	-	$	122,377	$	3,091,892		-	$	69,148

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
Total Notional Amount	$	11,550,000