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Note 12 Stock-Based Compensation (Tables) | 6 Months Ended
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Mar. 31, 2012
Share-based Compensation [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
| Three Months Ended |  | Six Months Ended
| March 31, 2012 |  | April 2, 2011 |  | March 31, 2012 |  | April 2, 2011
| (In thousands) |  |  |  |
Cost of sales | $ | 983 |  |  | $ | 1,013 |  |  | $ | 1,890 |  |  | $ | 2,052 |
Selling, general and administrative | 3,519 |  |  | 3,184 |  |  | 6,649 |  |  | 5,790 |
Research and development | 27 |  |  | 40 |  |  | 54 |  |  | 82 |
Total | $ | 4,529 |  |  | $ | 4,237 |  |  | $ | 8,593 |  |  | $ | 7,924 |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
| Three Months Ended |  | Six Months Ended
| March 31, 2012 |  | April 2, 2011 |  | March 31, 2012 |  | April 2, 2011
| (In thousands) |  |  |  |
Stock options | $ | 2,547 |  |  | $ | 2,661 |  |  | $ | 5,002 |  |  | $ | 5,411 |
Restricted stock units | 1,982 |  |  | 1,576 |  |  | 3,591 |  |  | 2,513 |
Total | $ | 4,529 |  |  | $ | 4,237 |  |  | $ | 8,593 |  |  | $ | 7,924 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| Three Months Ended |  | Six Months Ended
| March 31, 2012 |  | April 2, 2011 |  | March 31, 2012 |  | April 2, 2011
Volatility | 85.8 | % |  | 82.6 | % |  | 85.6 | % |  | 82.3 | %
Risk-free interest rate | 0.9 | % |  | 2.1 | % |  | 0.9 | % |  | 1.7 | %
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Expected life of options (years) | 5.0 |  |  | 5.0 |  |  | 5.0 |  |  | 5.0 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
| Number of Shares |  | Weighted- Average Exercise Price ($) |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value of In-The-Money Options ($)
| (In thousands) |  |  |  |  |  | (In thousands)
Outstanding, October 1, 2011 | 10,922 |  |  | 13.85 |  |  | 6.89 |  |  | 14,195 |
Granted | 892 |  |  | 8.64 |  |  |  |  |
Exercised/Cancelled/Forfeited/Expired | (208 | ) |  | 12.88 |  |  |  |  |
Outstanding, December 31, 2011 | 11,606 |  |  | 13.46 |  |  | 6.91 |  |  | 16,839 |
Granted | 116 |  |  | 10.99 |  |  |  |  |
Exercised/Cancelled/Forfeited/Expired | (480 | ) |  | 8.76 |  |  |  |  |
Outstanding, March 31, 2012 | 11,242 |  |  | 13.64 |  |  | 6.64 |  |  | 31,022 |
Vested and expected to vest, March 31, 2012 | 10,446 |  |  | 13.99 |  |  | 6.50 |  |  | 28,453 |
Exercisable, March 31, 2012 | 7,524 |  |  | 15.91 |  |  | 5.72 |  |  | 19,021 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
| Number of Shares |  | Weighted- Average Grant Date Fair Value ($) |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value ($)
| (In thousands) |  |  |  |  |  | (In thousands)
Outstanding, October 1, 2011 | 1,838 |  |  | 11.42 |  |  | 1.63 |  |  | 14,249 |
Granted | 610 |  |  | 8.69 |  |  |  |  |
Vested/Cancelled | (235 | ) |  | 11.39 |  |  |  |  |
Outstanding, December 31, 2011 | 2,213 |  |  | 10.67 |  |  | 1.79 |  |  | 19,119 |
Granted | 175 |  |  | 11.44 |  |  |  |  |
Vested/Cancelled | (86 | ) |  | 13.84 |  |  |  |  |
Outstanding, March 31, 2012 | 2,302 |  |  | 10.61 |  |  | 1.55 |  |  | 26,519 |
Expected to vest, March 31, 2012 | 1,717 |  |  | 10.36 |  |  | 1.55 |  |  | 19,776 |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6793087&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: 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=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&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 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 -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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