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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Employee Benefits And Share Based Compensation [Abstract] |
Schedule of Stock Option Activity | Stock option activity was as follows:
|  | Number of Shares |  |  | Weighted Average Exercise Price Per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
|  | (In thousands) |  |  | (In dollars) |  |  | (In years) |  |  | (In thousands) |
Outstanding as of December 31, 2020 |  |  | 1,333 |  |  | $ | 27.86 |  |  |  |  |  |  |  |  |
Exercised |  |  | (421 | ) |  | $ | 22.81 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2021 |  |  | 912 |  |  | $ | 30.19 |  |  |  | 6.11 |  |  | $ | 2,487 |
As of December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested and expected to vest |  |  | 912 |  |  | $ | 30.19 |  |  |  | 6.11 |  |  | $ | 2,487 |
Exercisable Options |  |  | 717 |  |  | $ | 30.96 |  |  |  | 5.74 |  |  | $ | 2,008 |
Schedule of Ranges of Outstanding And Exercisable Stock Options | The following table summarizes significant ranges of outstanding and exercisable stock options as of December 31, 2021:
|  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Shares Outstanding |  |  | Weighted- Average Remaining Contractual Life |  |  | Weighted- Average Exercise Price Per Share |  |  | Shares Exercisable |  |  | Weighted- Average Exercise Price Per Share |
|  | (In thousands) |  |  | (In years) |  |  | (In dollars) |  |  | (In thousands) |  |  | (In dollars) |
$18.58 - $25.37 |  |  | 264 |  |  |  | 4.09 |  |  | $ | 23.43 |  |  |  | 264 |  |  | $ | 23.43 |
$26.61 - $26.61 |  |  | 370 |  |  |  | 7.55 |  |  | $ | 26.61 |  |  |  | 186 |  |  | $ | 26.61 |
$38.32 - $41.67 |  |  | 278 |  |  |  | 6.12 |  |  | $ | 41.37 |  |  |  | 267 |  |  | $ | 41.42 |
$18.58 - $41.67 |  |  | 912 |  |  |  | 6.11 |  |  | $ | 30.19 |  |  |  | 717 |  |  | $ | 30.96 |
Schedule of RSU Activity | RSU activity was as follows:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Average Intrinsic Value |
|  | (In thousands) |  |  | (In dollars) |  |  | (In years) |  |  | (In thousands) |
Outstanding as of December 31, 2020 |  |  | 1,584 |  |  | $ | 30.66 |  |  |  |  |  |  |  |  |
Granted |  |  | 763 |  |  | $ | 38.53 |  |  |  |  |  |  |  |  |
Vested |  |  | (645 | ) |  | $ | 31.65 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (147 | ) |  | $ | 33.28 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2021 |  |  | 1,555 |  |  | $ | 33.86 |  |  |  | 1.38 |  |  | $ | 45,414 |
Schedule of Performance Shares Activity | Performance shares were never granted in the years prior to 2020. Performance shares activity was as follows:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Average Intrinsic Value |
|  | (In thousands) |  |  |  |  |  |  | (In years) |  |  | (In thousands) |
Outstanding as of December 31, 2018 |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Vested |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Cancelled |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2019 |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Granted |  |  | 141 |  |  | $ | 28.22 |  |  |  |  |  |  |  |  |
Vested |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Cancelled |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 141 |  |  | $ | 28.22 |  |  |  |  |  |  |  |  |
Granted |  |  | 152 |  |  | $ | 37.58 |  |  |  |  |  |  |  |  |
Vested |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Cancelled |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2021 |  |  | 293 |  |  | $ | 33.07 |  |  |  | 2.08 |  |  | $ | 8,559 |
Schedule of Weighted Average Assumptions | The following table sets forth the weighted-average assumptions used to estimate the fair value of purchase rights granted under the ESPP:
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | ESPP |
Expected life (in years) |  |  | 0.5 |  |  |  | 0.5 |  |  |  | 0.5 |
Risk-free interest rate |  |  | 0.05 | % |  |  | 0.72 | % |  |  | 2.06 | %
Expected volatility |  |  | 40.8 | % |  |  | 54.8 | % |  |  | 43.9 | %
Schedule of Total Stock-Based Compensation Expense Resulting from Stock Options, RSUs, Performance Shares and the ESPP | The following table sets forth the stock-based compensation expense resulting from stock options, RSUs, performance shares and the ESPP included in the Company’s consolidated statements of operations:
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | (In thousands) |
Cost of revenue |  | $ | 2,103 |  |  | $ | 4,091 |  |  | $ | 2,843 |
Research and development |  |  | 5,161 |  |  |  | 5,183 |  |  |  | 6,532 |
Sales and marketing |  |  | 7,628 |  |  |  | 7,634 |  |  |  | 9,069 |
General and administrative |  |  | 11,103 |  |  |  | 13,597 |  |  |  | 10,693 |
Total |  | $ | 25,995 |  |  | $ | 30,505 |  |  | $ | 29,137 |

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