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STOCK-BASED COMPENSATION | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
STOCK PLANS AND SHARE-BASED COMPENSATION | STOCK-BASED COMPENSATION: The following table summarizes the stock-based compensation expense recognized in accordance with ASC 718-10 for the three months ended March 31, 2019, and March 31, 2018:
| Three Months Ended
(In thousands) | March 31, 2019 |  | March 31, 2018
Cost of revenues | $ | 271 |  |  | $ | 249 |
Research and development | 1,632 |  |  | 1,839 |
Sales and marketing | 1,061 |  |  | 1,276 |
General and administrative | 1,443 |  |  | 2,261 |
Total stock-based compensation expense | $ | 4,407 |  |  | $ | 5,625 |
Stock-based compensation expense in the three months ended March 31, 2019, was approximately $4.4 million, comprising approximately $4.6 million related to restricted stock unit (RSU) awards, a reduction to expense of $0.6 million related to performance-based (PSU) awards and long-term performance-based (PRSU) awards and $0.4 million related to the Company’s employee stock purchase plan. Stock-based compensation expense in the three months ended March 31, 2018, was approximately $5.6 million, comprising approximately $4.3 million related to RSUs, $0.9 million related to PSUs and PRSUs and $0.4 million related to the Company’s employee stock purchase plan. Stock Options A summary of stock options outstanding as of March 31, 2019, and activity during the three months then ended, is presented below:
| Shares (In thousands) |  | Weighted- Average Exercise Price |  | Weighted-Average Remaining Contractual Term (In years) |  | Aggregate Intrinsic Value (In thousands)
Outstanding at January 1, 2019 | 335 |  |  | $ | 32.41 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | (85 | ) |  | $ | 20.92 |  |  |  |  |
Forfeited or expired | — |  |  | — |  |  |  |  |
Outstanding at March 31, 2019 | 250 |  |  | $ | 36.33 |  |  | 1.73 |  | $ | 8,404 |
Vested and exercisable at March 31, 2019 | 250 |  |  |  |  | 1.73 |  | $ | 8,404 |
PSU Awards Under the performance-based awards program, the Company grants awards in the performance year in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The number of shares that are released at the end of the performance year can range from zero to 200% of the target number depending on the Company’s performance. The performance metrics of this program are annual targets consisting of a combination of net revenue, non-GAAP operating income and strategic goals. As the net revenue, non-GAAP operating income and strategic goals are considered performance conditions, expense associated with these awards, net of estimated forfeitures, is recognized over the service period based on an assessment of the achievement of the performance targets. The fair value of these PSUs is determined using the fair value of the Company’s common stock on the date of the grant, reduced by the discounted present value of dividends expected to be declared before the awards vest. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed. In January 2019, it was determined that approximately 26,000 shares of the PSUs granted in 2018 vested in aggregate; the shares were released to the Company’s employees and executives in the first quarter of 2019. A summary of PSUs outstanding as of March 31, 2019, and activity during the three months then ended, is presented below:
| Shares (In thousands) |  | Weighted- Average Grant Date Fair Value Per Share |  | Weighted-Average Remaining Contractual Term (In years) |  | Aggregate Intrinsic Value (In thousands)
Outstanding at January 1, 2019 | 26 |  |  | $ | 62.87 |  |  |  |  |
Granted | 58 |  |  | $ | 69.46 |  |  |  |  |
Vested | (26 | ) |  | $ | 62.87 |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Outstanding at March 31, 2019 | 58 |  |  | $ | 69.46 |  |  | 0.75 |  | $ | 4,043 |
Outstanding and expected to vest at March 31, 2019 | 38 |  |  |  |  | 0.75 |  | $ | 2,648 |
PRSU Awards The Company's PRSU program provides for the issuance of PRSUs which will vest based on the Company's performance measured against the PRSU program's established revenue targets. PRSUs are granted in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The actual number of shares the recipient receives is determined at the end of a three-year performance period based on results achieved versus the Company's performance goals, and may range from zero to 200% of the target number. The performance goals for PRSUs granted in fiscal 2017, 2018 and 2019 were based on the Company’s annual revenue growth over the respective three-year performance period. Expense associated with these awards, net of estimated forfeitures, is recorded throughout the year depending on the number of shares expected to vest based on progress toward the performance target. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed. In January 2019, it was determined that approximately 70,000 shares of the PRSUs granted in 2016, vested in aggregate; the shares were released to the Company’s executives in the first quarter of 2019. A summary of PRSUs outstanding as of March 31, 2019, and activity during the three months then ended, is presented below:
| Shares (In thousands) |  | Weighted- Average Grant Date Fair Value Per Share |  | Weighted-Average Remaining Contractual Term (In years) |  | Aggregate Intrinsic Value (In thousands)
Outstanding at January 1, 2019 | 213 |  |  | $ | 55.48 |  |  |  |  |
Granted | 72 |  |  | $ | 68.17 |  |  |  |  |
Vested | (70 | ) |  | $ | 43.26 |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Outstanding at March 31, 2019 | 215 |  |  | $ | 63.70 |  |  | 1.75 |  | $ | 15,023 |
Outstanding and expected to vest at March 31, 2019 | 93 |  |  |  |  | 2.41 |  | $ | 6,534 |
RSU Awards A summary of RSUs outstanding as of March 31, 2019, and activity during the three months then ended, is presented below:
| Shares (In thousands) |  | Weighted- Average Grant Date Fair Value Per Share |  | Weighted-Average Remaining Contractual Term (In years) |  | Aggregate Intrinsic Value (In thousands)
Outstanding at January 1, 2019 | 895 |  |  | $ | 58.19 |  |  |  |  |
Granted | 119 |  |  | $ | 67.51 |  |  |  |  |
Vested | (112 | ) |  | $ | 54.38 |  |  |  |  |
Forfeited | (4 | ) |  | $ | 56.81 |  |  |  |  |
Outstanding at March 31, 2019 | 898 |  |  | $ | 59.91 |  |  | 2.20 |  | $ | 62,796 |
Outstanding and expected to vest at March 31, 2019 | 827 |  |  |  |  | 1.71 |  | $ | 57,871 |

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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