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Note 13 Stock-Based Compensation | 3 Months Ended
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Dec. 29, 2018
Share-based Compensation [Abstract] |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Stock-Based Compensation Stock-based compensation expense was attributable to:
| Three Months Ended
| December 29, 2018 |  | December 30, 2017
| (In thousands)
Stock options | $ | 93 |  |  | $ | 1,177 |
Restricted stock units, including performance based awards | 5,723 |  |  | 7,465 |
Total | $ | 5,816 |  |  | $ | 8,642 |
Stock-based compensation expense was recognized as follows:
| Three Months Ended
| December 29, 2018 |  | December 30, 2017
| (In thousands)
Cost of sales | $ | 1,735 |  |  | $ | 2,448 |
Selling, general and administrative | 3,990 |  |  | 6,164 |
Research and development | 91 |  |  | 30 |
Total | $ | 5,816 |  |  | $ | 8,642 |
As of December 29, 2018, an aggregate of 8.7 million shares were authorized for future issuance under the Company's stock plans, of which 6.7 million of such shares were issuable upon exercise of outstanding options and delivery of shares upon vesting of restricted stock units and 2.0 million shares of common stock were available for future grant. Restricted Stock Units Activity with respect to the Company's restricted stock units was as follows:
| Number of Shares |  | Weighted- Average Grant Date Fair Value ($) |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value ($)
| (In thousands) |  |  |  |  |  | (In thousands)
Outstanding as of September 29, 2018 | 3,303 |  |  | 30.33 |  |  | 1.21 |  | 97,913 |
Granted | 1,627 |  |  | 24.40 |  |  |  |  |
Vested/Forfeited/Cancelled | (1,198 | ) |  | 29.76 |  |  |  |  |
Outstanding as of December 29, 2018 | 3,732 |  |  | 27.93 |  |  | 1.83 |  | 88,781 |
Expected to vest as of December 29, 2018 | 2,699 |  |  | 27.80 |  |  | 1.63 |  | 64,205 |
As of December 29, 2018, unrecognized compensation expense of $54 million is expected to be recognized over a weighted average period of 1.6 years. Additionally, as of December 29, 2018, unrecognized compensation expense related to performance-based restricted stock units for which achievement of the performance criteria is not currently considered probable was $19 million.

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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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