XML 56 R33.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Stock-Based Compensation and Employee Benefit Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation | The Company recognizes stock-based compensation expense in the consolidated statements of operations, based on the department to which the related employee reports, as follows:
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
| (in thousands)
Cost of net revenue | $ | 577 |  |  | $ | 489 |  |  | $ | 332 |
Research and development | 16,545 |  |  | 17,953 |  |  | 16,190 |
Selling, general and administrative | 14,938 |  |  | 13,279 |  |  | 11,016 |
Restructuring expense | — |  |  | — |  |  | 5,130 |
| $ | 32,060 |  |  | $ | 31,721 |  |  | $ | 32,668 |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] | A summary of the Company’s restricted stock unit activity is as follows:
| Number of Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2018 | 3,263 |  |  | $ | 20.23 |
Granted | 1,580 |  |  | 23.23 |
Vested | (1,541 | ) |  | 20.16 |
Canceled | (378 | ) |  | 21.52 |
Outstanding at December 31, 2019 | 2,924 |  |  | 21.72 |
Share-based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] | A summary of the Company’s performance-based restricted stock unit activity is as follows:
| Number of Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value per Share
Outstanding at December 31, 2018 | — |  |  | $ | — |
Granted(1) | 445 |  |  | 22.21 |
Outstanding at December 31, 2019 | 445 |  |  | 22.21 |
________________ (1) Number of shares granted is based on the maximum percentage achievable in the performance-based restricted stock unit award.
Fair Value of Employee Stock Purchase Rights | 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:
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Weighted-average grant date fair value per share | $5.48 - 6.61 |  |  | $5.01 - $5.37 |  |  | $6.20 - $7.46 |
Risk-free interest rate | 1.59 - 2.43% |  |  | 2.09 - 2.51% |  |  | 0.60 - 1.39% |
Dividend yield | — | % |  | — | % |  | — | %
Expected term (in years) | 0.5 |  |  | 0.5 |  |  | 0.38 - 0.50 |
Volatility | 40.47 - 43.14% |  |  | 38.82 - 46.17% |  |  | 29.56 - 49.94% |
Share-based Payment Arrangement, Option, Activity [Table Text Block] | A summary of the Company’s stock option 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, 2018 | 2,659 |  |  | $ | 10.27 |  |  |  |  |
Exercised | (1,300 | ) |  | 7.28 |  |  |  |  |
Canceled | (22 | ) |  | 18.09 |  |  |  |  |
Outstanding at December 31, 2019 | 1,337 |  |  | $ | 13.05 |  |  | 2.56 |  | $ | 11,259 |
Vested and expected to vest at December 31, 2019 | 1,329 |  |  | $ | 13.02 |  |  | 2.55 |  | $ | 11,239 |
Exercisable at December 31, 2019 | 1,094 |  |  | $ | 11.87 |  |  | 1.93 |  | $ | 10,549 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair values of stock options granted in 2018 and 2017 were estimated using the Black-Scholes option pricing model on the grant date using the following assumptions:
| Years Ended December 31,
| 2018 |  | 2017(1)
Weighted-average grant date fair value per share | $ | 8.14 |  |  | 8.77 - 21.04 |
Risk-free interest rate | 2.76 | % |  | 1.29% - 1.99% |
Dividend yield | — | % |  | — | %
Expected term (in years) | 5.50 |  |  | 1.6 - 6.0 |
Volatility | 44.30 | % |  | 45.39% - 50.32% |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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=116856206&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=116856206&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardOutstandingActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration