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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 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 and six months ended June 30, 2022 and 2021:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
(In thousands) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Cost of revenues | ​ | $ | 235 | ​ | $ | 640 | ​ | $ | 555 | ​ | $ | 1,271
Research and development | ​ |  | 2,323 | ​ |  | 3,159 | ​ |  | 5,378 | ​ |  | 5,550
Sales and marketing | ​ |  | 1,177 | ​ |  | 1,725 | ​ |  | 3,125 | ​ |  | 3,339
General and administrative | ​ |  | (56) | ​ |  | 3,676 | ​ |  | 3,634 | ​ |  | 7,520
Total stock-based compensation expense | ​ | $ | 3,679 | ​ | $ | 9,200 | ​ | $ | 12,692 | ​ | $ | 17,680
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 June 30, 2022 and activity during the six months ended, is presented below:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Weighted-Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-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 |  | 118 | ​ | $ | 79.93 |  | ​ |  | ​ |
Vested |  | (104) | ​ | $ | 84.47 |  |  |  | ​ |
Forfeited |  | (2) | ​ | $ | 79.23 |  |  |  | ​ |
Outstanding at June 30, 2022 |  | 116 | ​ | $ | 79.94 |  | 0.50 | ​ | $ | 8,678
Outstanding and expected to vest at June 30, 2022 |  | 75 | ​ |  | ​ | ​ | 0.50 | ​ | $ | 5,623
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 June 30, 2022 and activity during the six 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 June 30, 2022 |  | 358 | ​ | $ | 68.18 |  | 1.40 | ​ | $ | 26,881
Outstanding and expected to vest at June 30, 2022 |  | 152 | ​ |  | ​ | ​ | 1.07 | ​ | $ | 11,408
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 June 30, 2022 and activity during the six 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 |  | 481 | ​ | $ | 76.45 |  |  |  | ​ |
Vested |  | (433) | ​ | $ | 42.34 |  |  |  | ​ |
Forfeited |  | (40) | ​ | $ | 56.04 |  |  |  | ​ |
Outstanding at June 30, 2022 |  | 1,152 | ​ | $ | 60.55 |  | 2.00 | ​ | $ | 86,448
Outstanding and expected to vest at June 30, 2022 |  | 1,053 | ​ |  | ​ | ​ | 1.89 | ​ | $ | 79,006

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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