XML 237 R42.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stock Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of stock-based compensation | The following table summarizes stock-based compensation expense related to all of the Company’s stock awards included in operating expense categories as follows:
| December 31,
| 2017 |  | 2016 |  | 2015
|  |  | (Restated) |  | (Restated)
Cost of revenues | $ | 4,602 |  |  | $ | 7,310 |  |  | $ | 6,922 |
Research and development | 6,030 |  |  | 8,891 |  |  | 7,461 |
Selling, general and administrative | 11,863 |  |  | 17,977 |  |  | 17,021 |
Total stock-based compensation | $ | 22,495 |  |  | $ | 34,178 |  |  | $ | 31,404 |
The following table summarizes stock-based compensation expense:
| December 31,
| 2017 |  | 2016 |  | 2015
|  |  | (Restated) |  | (Restated)
Stock options | $ | 6,311 |  |  | $ | 7,778 |  |  | $ | 8,495 |
Restricted stock awards | 15,802 |  |  | 25,583 |  |  | 22,285 |
ESPP Plan | 382 |  |  | 817 |  |  | 624 |
Total stock-based compensation before taxes | $ | 22,495 |  |  | $ | 34,178 |  |  | $ | 31,404 |
Tax benefit | $ | 3,921 |  |  | $ | 11,108 |  |  | $ | 10,130 |
Schedule of fair value assumptions | The weighted-average assumptions used in the Black-Scholes option pricing model are as follows:
| December 31,
| 2017 |  | 2016 |  | 2015
Expected stock price volatility | 57.0 | % |  | 45.0 | % |  | 47.0 | %
Risk-free interest rate | 1.8 | % |  | 1.2 | % |  | 1.3 | %
Expected life of options (in years) | 4.08 |  |  | 4.00 |  |  | 4.00 |
Expected dividend yield | — | % |  | — | % |  | — | %
Weighted-average fair value (grant date) of the options | $ | 6.30 |  |  | $ | 11.13 |  |  | $ | 15.88 |
Schedule of information about stock options outstanding | The following table summarizes information about stock options outstanding:
Options |  | Number of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding at December 31, 2016 (restated) |  | 2,306 |  |  | $ | 32.43 |  |  |  |  |
Options Granted |  | 2,891 |  |  | $ | 15.09 |  |  |  |  |
Options Exercised |  | (104 | ) |  | $ | 11.34 |  |  |  |  |
Options Cancelled |  | (1,143 | ) |  | $ | 12.93 |  |  |  |  |
Outstanding at December 31, 2017 |  | 3,950 |  |  | $ | 21.54 |  |  | 5.34 |  | $ | — |
Vested and exercisable at December 31, 2017 |  | 1,185 |  |  | $ | 32.35 |  |  | 3.26 |  | $ | — |
Schedule of total intrinsic value for options exercised and fair value of vested options | The below table summarizes additional information related to stock options:
| December 31,
| 2017 |  | 2016 |  | 2015
Total intrinsic value for stock options exercised | $ | 1,007 |  |  | $ | 8,953 |  |  | $ | 18,369 |
Summary of unvested restricted stock activity | A summary of the Company’s unvested restricted stock at December 31, 2017, and changes during the year ended December 31, 2017, is presented below:
Non-Vested Restricted Stock |  | Number of Awards |  | Weighted- Average Grant Date Fair Value
Non-vested at December 31, 2016 (restated) |  | 1,645 |  |  | $ | 36.27 |
Granted |  | 3,426 |  |  | 22.75 |
Vested |  | (946 | ) |  | 32.16 |
Forfeited |  | (2,061 | ) |  | 22.21 |
Non-vested at December 31, 2017 |  | 2,064 |  |  | $ | 22.75 |

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 the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&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 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration