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Note 8 - Stock-Based Compensation (Detail) - Stock Option Activity (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 29, 2012 | Oct. 01, 2011 | Oct. 02, 2010
Options Outstanding (in Shares) | 994 | 847 | 673
Contractual Term Weighted Average | 6 years 229 days |  |
Vested and anticipated to vest in future at September 29, 2012 (in Shares) | 1,147 |  |
Vested and anticipated to vest in future at September 29, 2012 | 6 years 222 days |  |
Vested and anticipated to vest in future at September 29, 2012 (in Dollars) | $ 1,904 |  |
Exercisable at September 29, 2012 (in Shares) | 802 |  |
Exercisable at September 29, 2012 | 5 years 215 days |  |
Exercisable at September 29, 2012 (in Dollars) | 1,540 |  |
Options Outstanding (in Shares) | 178 | 171 | 200
Options Outstanding (in Shares) | (12) | (13) | (26)
Aggregate Intrinsic Value (in Dollars) | 147 | 143 | 146
Forfeited (in Shares) |  | (11) |
Options Outstanding (in Shares) | 1,160 | 994 | 847
Contractual Term Weighted Average | 6 years 229 days |  |
Aggregate Intrinsic Value (in Dollars) | $ 1,919 |  |
Minimum [Member] |  |  |
Exercise Price Per Share Range | $ 0.18 | $ 0.18 | $ 0.18
Exercise Price Per Share Weighted Average | $ 0.36 | $ 0.18 | $ 0.18
Exercise Price Per Share Range | $ 10.23 | $ 10.72 | $ 9.16
Exercise Price Per Share Weighted Average | $ 10.23 | $ 10.72 | $ 9.16
Exercise Price Per Share Range | $ 0.18 | $ 1.06 | $ 4.19
Exercise Price Per Share Weighted Average | $ 0.18 | $ 1.06 | $ 4.19
Forfeited |  | $ 11.15 |
Forfeited |  | $ 11.15 |
Exercise Price Per Share Range | $ 0.36 | $ 0.18 | $ 0.18
Maximum [Member] |  |  |
Exercise Price Per Share Range | $ 20.27 | $ 20.27 | $ 20.27
Exercise Price Per Share Weighted Average | $ 20.27 | $ 20.27 | $ 20.27
Exercise Price Per Share Range | $ 13.06 | $ 12.43 | $ 9.39
Exercise Price Per Share Weighted Average | $ 13.06 | $ 12.43 | $ 9.39
Exercise Price Per Share Range | $ 0.18 | $ 7.55 | $ 11.15
Exercise Price Per Share Weighted Average | $ 0.18 | $ 7.55 | $ 11.15
Forfeited |  | $ 11.15 |
Forfeited |  | $ 11.15 |
Exercise Price Per Share Range | $ 20.27 | $ 20.27 | $ 20.27
Weighted Average [Member] |  |  |
Exercise Price Per Share Range | $ 10.89 | $ 10.63 | $ 10.83
Exercise Price Per Share Weighted Average | $ 11.09 | $ 10.89 | $ 10.63
Vested and anticipated to vest in future at September 29, 2012 | $ 11.09 |  |
Exercisable at September 29, 2012 | $ 11.10 |  |
Exercise Price Per Share Range | $ 11.44 | $ 11.49 | $ 9.27
Exercise Price Per Share Weighted Average | $ 11.44 | $ 11.49 | $ 9.27
Exercise Price Per Share Range | $ 0.18 | $ 1.60 | $ 5.41
Exercise Price Per Share Weighted Average | $ 0.18 | $ 1.60 | $ 5.41
Forfeited |  | $ 11.15 |
Forfeited |  | $ 11.15 |
Exercise Price Per Share Range | $ 11.09 | $ 10.89 | $ 10.63

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: 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 The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c), d(2) -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 The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -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 Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: 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 The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan. + 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=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -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 Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(g) -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 Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(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. + Details
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- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(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. Reference 2: 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 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) -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 Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -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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