Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Summary of restricted and performance stock units

A summary of the Company’s RSUs and PSUs as of September 30, 2019 and changes during the nine months then ended is presented below: 

			Weighted-			Weighted-
	Number		Average		Number	Average
	of RSUs		Fair Value RSUs		of PSUs	Fair Value PSUs
Outstanding as of December 31, 2018	881,832		$	21.75	—	$	—
Granted	655,135		23.51		207,077	23.47
Vested	(516,176	)	20.53		—	—
Forfeited	(22,275	)	23.92		—	—
Outstanding as of September 30, 2019	998,516		$	23.48	207,077	$	23.47
Undelivered (1)	113,209				—

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(1) Shares of common stock related to vestings occurring in 2019 that were not delivered as of September 30, 2019.

Summary of shares of common stock issued

A summary of shares of common stock issued related to the 2015 Plan, including the impact of any DERs issued in common stock, is presented below:

	Nine months ended				Nine months ended
	September 30, 2019				September 30, 2018
	RSUs		PSUs		RSUs	PSUs
Shares of common stock issued (1)	407,083		900,226		403,538	—
Shares of common stock withheld by the Company as payment by employees in lieu of cash to satisfy tax withholding obligations	(123,013	)	(325,246	)	(122,795)	—
Net shares of common stock issued	284,070		574,980		280,743	—
Cumulative undelivered shares of common stock	172,627		—		—	—

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(1) Shares of common stock issued related to PSUs represents PSUs that vested in 2018 but were delivered in common stock during the nine months ended September 30, 2019.

Schedule of compensation expense related to equity incentive plans

The allocation of compensation expense related to equity incentive plans in the unaudited condensed consolidated statements of operations was as follows:

	Three months ended				Nine months ended
	September 30,				September 30,
(in thousands)	2019		2018		2019		2018
Cost of goods sold	$	218	$	217	$	579	$	424
Selling, general and administrative	2,153		4,073		6,794		12,365
Research and development	234		380		618		991
Total compensation expense before income tax	2,605		4,670		7,991		13,780
Income tax benefit	580		938		1,716		2,820
Total compensation expense, net of income tax	$	2,025	$	3,732	$	6,275	$	10,960