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

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.

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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.

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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.

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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.

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