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Stock-Based Compensation and Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | The Company recognizes stock-based compensation in the consolidated statements of income, based on the department to which the related employee reports, as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (in thousands) |  | (in thousands)
Cost of net revenue | $ | 120 |  |  | $ | 79 |  |  | $ | 226 |  |  | $ | 138 |
Research and development | 4,454 |  |  | 4,011 |  |  | 8,828 |  |  | 7,504 |
Selling, general and administrative | 2,735 |  |  | 3,024 |  |  | 6,728 |  |  | 4,946 |
Restructuring | — |  |  | 4,514 |  |  | — |  |  | 4,514 |
| $ | 7,309 |  |  | $ | 11,628 |  |  | $ | 15,782 |  |  | $ | 17,102 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of the Company’s restricted stock unit and restricted stock award activity is as follows:
| Number of Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2017 | 3,183 |  |  | $ | 20.13 |
Granted | 1,979 |  |  | 19.70 |
Vested | (987 | ) |  | 18.73 |
Canceled | (307 | ) |  | 20.86 |
Outstanding at June 30, 2018 | 3,868 |  |  | 20.23 |
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions | The fair values of employee stock purchase rights were estimated using the Black-Scholes option pricing model at their respective grant date using the following assumptions:
| Six Months Ended
| June 30, 2018
Weighted-average grant date fair value per share | $ | 5.37 |
Risk-free interest rate | 2.09 | %
Dividend yield | — | %
Expected life (in years) | 0.50 |
Volatility | 46.00 | %
Share-based Compensation, Stock Options, Activity | A summary of the Company’s stock options activity is as follows:
| Number of Options (in thousands) |  | Weighted-Average Exercise Price |  | Weighted-Average Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2017 | 3,069 |  |  | $ | 8.95 |  |  |  |  |
Exercised | (272 | ) |  | 7.73 |  |  |  |  |
Canceled | (33 | ) |  | 14.83 |  |  |  |  |
Outstanding at June 30, 2018 | 2,764 |  |  | $ | 9.00 |  |  | 2.09 |  | $ | 19,932 |
Vested and expected to vest at June 30, 2018 | 2,738 |  |  | $ | 8.93 |  |  | 2.06 |  | $ | 19,902 |
Exercisable at June 30, 2018 | 2,484 |  |  | $ | 8.25 |  |  | 1.79 |  | $ | 19,479 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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=109197908&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=115993241&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=109197908&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: 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=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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