Stockholders' Equity (Tables)

9 Months Ended

Jun. 30, 2019

Stockholders' Equity

Summary of assumptions used for the valuation of the RSUs with performance and market-based vesting that were granted

The following table includes the assumptions used for the valuation of the RSUs with performance and market-based vesting that were granted during fiscal 2019:

	RSUs granted during the nine months ended June 30, 2019
Date of grant	November 21, 2018	April 1, 2019
Grant date fair value	$67.40	$59.29
Performance period begins	October 1, 2018	October 1, 2018
Performance period ends	September 30, 2021	September 30, 2021
Risk-free interest rate	2.8%	2.8%
Expected volatility	34%	34%

Summary of RSU activity

The following table summarizes our RSU activity:

	Unvested Restricted Stock Units with Service-Based Vesting
		Weighted Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	366,460	$	52.31
Granted	232,667		62.50
Vested	(143,513)		50.73
Forfeited	(34,744)		54.80
Unvested at June 30, 2019	420,870	$	58.28

	Unvested Restricted Stock Units with Performance-Based Vesting
		Weighted Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	635,628	$	50.11
Granted	—		—
Vested	—		—
Forfeited	(320,753)		44.63
Unvested at June 30, 2019	314,875	$	55.68

	Unvested Restricted Stock Units with Performance and Market-Based Vesting
		Weighted Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	—	$	—
Granted	237,616		66.79
Vested	—		—
Forfeited	(10,214)		67.40
Unvested at June 30, 2019	227,402	$	66.77

Schedule of stock-based compensation expense related to stock-based awards

We recorded non-cash compensation expense related to stock-based awards as follows (in thousands):

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Cost of sales	$	498	$	357	$	1,236	$	729
Selling, general and administrative		3,904		2,246		9,524		4,371
	$	4,402	$	2,603	$	10,760	$	5,100