Stock-Based Compensation (Tables)

12 Months Ended

Apr. 30, 2018

Stock-Based Compensation

Schedule of weighted average assumptions used to estimate fair value of stock options granted

	Year Ended April 30,
	2018			2017			2016
Expected term (in years)		—			—			6.00
Expected volatility		—	%		—	%		36.14	%
Risk-free interest rate		—	%		—	%		1.88	%
Expected dividend		—			—			—
Weighted average fair value at grant date	$	—		$	—		$	10.18

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,  2015	652,117		23.96	44,993		7.57	78,604		0.59
Options granted	128,000		26.83	—		—	—		—
Options exercised	(43,000)		21.81	(31,161)		5.70	(10,000)		0.59
Options canceled	(58,318)		25.98	(8)		2.13	—		—
Outstanding at April 30, 2016	678,799		24.46	13,824		11.79	68,604		0.59
Options granted	—		—	—		—	—		—
Options exercised	(167,310)		22.32	(9,601)		11.79	(25,189)		0.59
Options canceled	(64,865)		26.76	(4,223)		11.79	—		—
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 exercisable at April 30, 2018	256,012	$	24.81	—	$	—	18,302	$	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, 2017	140,118	$	10.76
Granted	—		—
Expired	—		—
Canceled	—		—
Vested	(57,104)		10.45
Non-vested at April 30, 2018	83,014	$	10.97

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				2018	Years	Price		2018	Price
$	0.59	-	19.16	72,302	4.23	$	13.78	72,302	$	13.78
	19.17	-	26.24	58,500	4.86		20.54	48,500		20.71
	26.25	-	26.99	80,000	7.15		26.70	32,000		26.70
	27.00	-	27.99	50,000	5.56		27.27	40,000		27.27
	28.00	-	32.19	96,526	4.59		29.90	81,512		29.65
$	0.59	-	32.19	357,328	5.27	$	24.02	274,314	$	23.20

Schedule of Company's restricted stock awards

Information related to the Company’s restricted stock awards at April 30, 2018 and for the year then ended is as follows:

	Restated 2006 Plan
		Weighted
		Average
		Grant Date
	Shares	Fair Value
Unvested stock at April 30, 2017	339,145	$	26.27
Stock granted	131,332		37.71
Stock vested	(133,886)		25.25
Stock canceled	(4,016)		26.10
Unvested stock at April 30, 2018	332,575	$	31.20