Equity Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Summary of restricted and performance stock units

A summary of the Company’s RSUs and PSUs as of March 31, 2020 and changes during the three 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, 2019	947,243		$	23.49	207,077	$	23.47
Granted	492,975		25.45		252,031	25.45
Vested (1)	(62,259	)	21.38		—	—
Outstanding as of March 31, 2020	1,377,959		$	24.28	459,108	$	24.55

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(1) Included 52,386 shares of common stock related to RSUs and no shares of common stock related to PSUs that were not delivered as of March 31, 2020.

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:

	Three months ended			Three months ended
	March 31, 2020			March 31, 2019
	RSUs		PSUs	RSUs	PSUs
Shares of common stock issued (1)	42,797		—	392,062	900,226
Shares of common stock withheld by the Company as payment by employees in lieu of cash to satisfy tax withholding obligations	(13,831	)	—	(123,013)	(325,246	)
Net shares of common stock issued	28,966		—	269,049	574,980
Cumulative undelivered shares of common stock	240,512		—	147,251	—

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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 three months ended March 31, 2019.

Compensation expense recorded in the consolidated statement of operations

Compensation expense recorded related to RSUs and PSUs in the consolidated statement of operations was as follows:

	Three months ended
	March 31,
(in thousands)	2020			2019
RSUs	$	2,478		$	1,570
PSUs	(455		)	215

Schedule of compensation expense related to equity incentive plans

The allocation of share-based compensation expense in the unaudited condensed consolidated statements of operations was as follows:

	Three months ended
	March 31,
(in thousands)	2020		2019
Cost of goods sold	$	225	$	167
Selling, general and administrative	1,714		1,467
Research and development	248		151
Total compensation expense before income tax	2,187		1,785
Income tax benefit	463		390
Total compensation expense, net of income tax	$	1,724	$	1,395