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Note 5 - Stock-Based Compensation (Detail) - Compensation Expense and Excess Tax Benefits Associated with Stock Options (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Excess tax benefits	$ (295)	$ (126)	$ (331)	$ (131)
Stock Options [Member]
Compensation expense	$ 347	$ 319	$ 486	$ 448

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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