Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Equity Compensation Goals

Revenue Goal (1) (in thousands)	Achievement Status	Adjusted EBITDA (in thousands)	Achievement Status
Goal #1, $710,058	Achieved	Goal #1, $125,000	Achieved
Goal #2, $860,058	Achieved	Goal #2, $155,000	Achieved
Goal #3, $1,010,058	Probable	Goal #3, $175,000	Achieved
Goal #4, $1,210,058	Probable	Goal #4, $190,000	Achieved
Goal #5, $1,410,058	Not Applicable	Goal #5, $200,000	Achieved
Goal #6, $1,610,058	Not Applicable	Goal #6, $210,000	Achieved
Goal #7, $1,810,058	Not Applicable	Goal #7, $220,000	Achieved
Goal #8, $2,010,058	Not Applicable	Goal #8, $230,000	Achieved

(1) In connection with the business acquisition that was completed during the three months ended September 30, 2018, the revenue goals were adjusted for the acquiree’s Target Revenue, as defined in the CEO Performance Award agreement.

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the three months ended March 31, 2022 (number of units and aggregate intrinsic value in thousands):

	Number of	Weighted Average		Aggregate
	Units	Grant-Date Fair Value		Intrinsic Value
Units outstanding, beginning of year	1,115	$	133.40
Granted	149		137.89
Released	(93)		76.70
Forfeited	(25)		136.92
Units outstanding, end of period	1,146		138.48	$	157,892

Summary of Performance Stock Unit Activity

The following table summarizes PSU activity, inclusive of XSUs, for the three months ended March 31, 2022 (number of units and aggregate intrinsic value in thousands):

	Number of	Weighted Average		Aggregate
	Units	Grant-Date Fair Value		Intrinsic Value
Units outstanding, beginning of year	1,499	$	39.86
Granted	46		130.33
Released	(18)		128.52
Forfeited	(10)		53.93
Units outstanding, end of period	1,517		41.48	$	208,987

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the three months ended March 31, 2022 (number of units and aggregate intrinsic value in thousands):

				Weighted
		Weighted		Average
	Number	Average		Remaining
	of	Exercise		Contractual	Aggregate
	Options	Price		Life (years)	Intrinsic Value
Options outstanding, beginning of year	2,438	$	28.58
Granted	—		—
Exercised	—		—
Expired / terminated	—		—
Options outstanding, end of period	2,438		28.58	5.91	$	266,103
Options exercisable, end of period	1,377		28.58	5.91		150,297

Reported Share-Based Compensation

The following table summarizes the composition of stock-based compensation expense for the three months ended March 31, 2022 and 2021 (in thousands):

	Three Months Ended March 31,
	2022		2021
Cost of products sold and services delivered	$	1,108	$	1,489
Sales, general and administrative expenses		10,998		71,015
Research and development expenses		12,982		17,106
Total stock-based compensation expense	$	25,088	$	89,610