Equity-Based Compensation - (Tables)

6 Months Ended

Oct. 31, 2019

Equity-Based Compensation

Summary of stock option activity

				Weighted
		Weighted		Average
		Average		Remaining	Aggregate
	Number of	Exercise		Contractual	Intrinsic
	Options	Price		Life (years)	Value
	(shares and dollars in thousands)
Outstanding as of April 30, 2019	2,080	$	16.34	6.15	$	7,615
Options granted	380		21.52
Options exercised	(534)		12.65
Options forfeited	(102)		25.59
Options expired	—		—
Outstanding as of October 31, 2019	1,824	$	17.96	6.57	$	22,326
Exercisable as of October 31, 2019	1,242	$	15.32	5.35	$	18,354
Vested and expected to vest as of October 31, 2019	1,816	$	17.93	6.56	$	22,272

Schedule of weighted average assumptions used in Black-Scholes option-pricing model

	Six Months Ended
	October 31,
	2019		2018
Volatility	49.94	%	33.71	%
Expected life (years)	6.0		6.0
Risk-free interest rate	1.97	%	2.87	%
Dividend yield	—	%	—	%

Summary of restricted stock unity activity

		Weighted
	Number of	Average
	Restricted	Exercise
	Stock Units	Price
	(shares in thousands)
Outstanding as of April 30, 2019	193	$	25.48
Granted	230		21.56
Vested	(67)		25.59
Forfeited	(40)		25.29
Outstanding as of October 31, 2019	316	$	22.60