Employee Benefit Plans (Tables)

12 Months Ended

Apr. 30, 2023

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, 2023 and 2022:

						Stock Options and Stock Appreciation Rights
									Weighted Average
				Weighted-Average		Grant Date			Remaining	Aggregate
	Shares			Exercise Price		Fair Value			Contractual Term	Intrinsic Value
Outstanding – April 30, 2021		615,000		$	9.88	$	6,076,105		1.8 years	$	2,141,905
Granted		-			-		-
Exercised		(42,875	)		7.30		(313,056	)			34,660
Expired or Canceled		(143,000	)		10.48		(1,498,300	)
Outstanding – April 30, 2022		429,125		$	9.94	$	4,264,749		1.3 years	$	2,141,905
Granted		-			-		-
Exercised		-			-		-				-
Expired or Canceled		(185,500	)		8.84		(1,639,970	)
Outstanding – April 30, 2023		243,625		$	10.77	$	2,624,779		0.8 years	$	1,592,089
Exercisable		243,625		$	10.77	$	2,624,779		0.8 years	$	1,592,089
Available for future grants		851,965

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 fiscal years ended April 30, 2023 and 2022:

				Weighted-Average
	Shares			Grant Date Fair Value
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			10.26
Granted		265,000			6.29
Vested		(12,401	)		10.01
Forfeited		(24,812	)		9.90
Balance – April 30, 2023		293,396			6.64