Employee Benefit Plans (Tables)

12 Months Ended

Apr. 30, 2022

Disclosure Text Block Supplement [Abstract]

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

The following table summarizes information about stock option and SARs activity for the years ended April 30, 2022 and 2021:

	Stock Options and Stock Appreciation Rights
						Weighted Average
				Weighted-Average		Remaining	Aggregate
	Shares			Exercise Price		Contractual Term	Intrinsic Value
Outstanding – April 30, 2020		1,059,500		$	9.74	2.2 years	$	5,416,783
Granted		-			-
Exercised		(247,500	)		8.42			573,418
Expired or Canceled		(197,000	)		10.96
Outstanding – April 30, 2021		615,000		$	9.88	1.8 years	$	2,141,905
Granted		-			-
Exercised		(42,875	)		7.30			34,660
Expired or Canceled		(143,000	)		10.48
Outstanding – April 30, 2022		429,125		$	9.94	1.3 years	$	3,278,704
Exercisable		393,500		$	10.06	1.4 years	$	2,989,785
Available for future grants		906,653

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

The following table summarizes activity for the RSUs and PSUs awards that reduce available capacity under the 2005 Stock Award Plan for the years ended April 30, 2022 and 2021:

				Weighted-Average
	Shares			Exercise Price
Balance – April 30, 2020		13,000			11.38
Granted		47,250			10.03
Vested		(3,250	)		11.38
Balance – April 30, 2021		57,000			10.26
Granted		26,250			9.84
Vested		(15,066	)		10.32
Forfeited		(2,575	)		9.97
Balance – April 30, 2022		65,609			10.09