Stock-Based Compensation (Tables)

12 Months Ended

Apr. 30, 2020

Stock-Based Compensation

Schedule of stock option plans

	Restated 2006 Plan			2002 Plan			1992 Plan
		Weighted			Weighted			Weighted
		Average			Average			Average
		Exercise			Exercise			Exercise
	Shares	Price		Shares	Price		Shares	Price
Outstanding at April 30, 2017	446,624		24.93	—		—	43,415		0.59
Options granted	—		—	—		—	—		—
Options exercised	(107,598)		23.80	—		—	(25,113)		0.59
Options canceled	—		—	—		—	—		—
Outstanding at April 30, 2018	339,026		25.29	—		—	18,302		0.59
Options granted	—		—	—		—	—		—
Options exercised	(2,000)		32.19	—		—	(4,000)		0.59
Options canceled	—		—	—		—	—		—
Outstanding at April 30, 2019	337,026		25.25	—		—	14,302		0.59
Options granted	—		—	—		—	—		—
Options exercised	(3,000)		31.15	—		—	(13,189)		0.59
Options canceled	—		—	—		—	—		—
Outstanding at April 30, 2020	334,026		25.19	—		—	1,113		0.59
Options exercisable at April 30, 2020	318,026	$	25.12	—	$	—	1,113	$	0.59

Schedule of the status of the Company's non-vested stock options

		Weighted
		Average
		Grant Date
Non-vested Options	Options	Fair Value
Non-vested at April 30, 2019	39,510	$	10.90
Granted	—		—
Expired	—		—
Canceled	—		—
Vested	(23,510)		11.40
Non-vested at April 30, 2020	16,000	$	10.16

Schedule of information concerning outstanding and exercisable options

				Options Outstanding
					Weighted
					Average			Options Exercisable
					Remaining	Weighted			Weighted
				As of	Contractual	Average		As of	Average
				April 30,	Life In	Exercise		April 30,	Exercise
Range of Exercise Prices				2020	Years	Price		2020	Price
$	0.59	-	19.16	55,113	2.93	$	17.90	55,113	$	17.90
	19.17	-	26.24	58,500	2.86		20.54	58,500		20.54
	26.25	-	26.99	80,000	5.15		26.70	64,000		26.70
	27.00	-	27.99	50,000	3.56		27.27	50,000		27.27
	28.00	-	29.26	50,000	1.83		28.72	50,000		28.72
	29.27	-	31.27	41,526	3.94		31.13	41,526		31.13
$	0.59	-	31.27	335,139	3.50	$	25.11	319,139	$	25.03

Schedule of Company's restricted stock awards

Information related to the Company’s restricted stock awards at April 30, 2020 and for the year then ended is as follows:

	Restated 2006 Plan
		Weighted
		Average
		Grant Date
	Shares	Fair Value
Unvested stock at April 30, 2019	226,159	$	43.35
Stock granted	131,991		52.71
Stock vested	(143,962)		34.03
Stock canceled	(12,541)		47.86
Unvested stock at April 30, 2020	201,647	$	55.84