v3.22.1

STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-based Compensation Expense

The following table summarizes the stock-based compensation expense recognized in accordance with ASC 718-10 for the three months ended March 31, 2022 and 2021:

​	​	​	​	​	​	​
​	​	Three Months Ended
​	​	March 31,
(In thousands)		2022			2021
Cost of revenues	​	$	320	​	$	631
Research and development	​		3,055	​		2,391
Sales and marketing	​		1,948	​		1,614
General and administrative	​		3,690	​		3,844
Total stock-based compensation expense	​	$	9,013	​	$	8,480

Summary of Option Activity Under the Plans

A summary of stock options outstanding as of March 31, 2022, and activity during the three months ended, is presented below:

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-	​	​	​
​	​	​	​	Weighted-		​	Average	​	​	​
​	​	​	​	Average		​	Remaining	​	Aggregate
​	​	Shares	​	Exercise		​	Contractual Term	​	Intrinsic Value
​		(In thousands)		Price			(In years)		(In thousands)
Outstanding at January 1, 2022		12	​	$	21.44		​		​	​
Granted		—	​	​	—				​
Exercised		(12)	​	$	21.44				​
Forfeited or expired		—	​	​	—				​
Outstanding at March 31, 2022		—	​	$	—		—	​	$	—
Vested and exercisable at March 31, 2022		—	​		​	​	—	​	$	—

Performance Based Awards (PSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of PSUs outstanding as of March 31, 2022, and activity during the three months ended, is presented below:

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-	​	​	​
​	​	​	​	Weighted-		​	Average	​	​	​
​	​	​	​	Average		​	Remaining	​	Aggregate
​	​	Shares	​	Grant Date Fair		​	Contractual Term	​	Intrinsic Value
​		(In thousands)		Value Per Share			(In years)		(In thousands)
Outstanding at January 1, 2022		104	​	$	84.47		​		​	​
Granted		117	​	$	79.84		​		​
Vested		(104)	​	$	84.47				​
Forfeited		—	​	​	—				​
Outstanding at March 31, 2022		117	​	$	79.84		0.75	​	$	10,819
Outstanding and expected to vest at March 31, 2022		117	​		​	​	0.75	​	$	10,819

Long-Term Performance-Based Awards (PRSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of PRSUs outstanding as of March 31, 2022, and activity during the three months ended, is presented below:

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-Average	​	Aggregate
​	​	​	​	Weighted-Average		​	Remaining	​	Intrinsic
​	​	Shares	​	Grant Date Fair		​	Contractual Term	​	Value
​		(In thousands)		Value Per Share			(In years)		(In thousands)
Outstanding at January 1, 2022		383	​	$	53.14		​		​	​
Granted		110	​	$	78.96				​
Vested		(135)	​	$	34.09				​
Forfeited		—	​	​	—				​
Outstanding at March 31, 2022		358	​	$	68.18		1.65	​	$	33,214
Outstanding and expected to vest at March 31, 2022		332	​		​	​	1.56	​	$	30,771

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of RSUs outstanding as of March 31, 2022, and activity during the three months ended, is presented below:

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-Average	​	Aggregate
​	​	​	​	Weighted-Average		​	Remaining	​	Intrinsic
​	​	Shares	​	Grant Date Fair		​	Contractual Term	​	Value
​		(In thousands)		Value Per Share			(In years)		(In thousands)
Outstanding at January 1, 2022		1,144	​	$	46.81		​		​	​
Granted		257	​	$	77.73				​
Vested		(158)	​	$	42.27				​
Forfeited		(9)	​	$	52.58				​
Outstanding at March 31, 2022		1,234	​	$	53.78		1.78	​	$	114,351
Outstanding and expected to vest at March 31, 2022		1,157	​		​	​	1.36	​	$	107,194

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