Note 10 - Earnings Per Share - Basic and Diluted Earnings Per Share Attributable to Common Shareholders (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Net earnings	$ 2,544,000us-gaap_NetIncomeLoss	$ 3,522,000us-gaap_NetIncomeLoss	$ 6,694,000us-gaap_NetIncomeLoss	$ 6,269,000us-gaap_NetIncomeLoss
Basic weighted average shares outstanding (in shares)	18,404	18,234	18,391	18,212
Dilutive effect of stock-based compensation (in shares)	418	403	430	400
Diluted weighted average shares outstanding (in shares)	18,822	18,637	18,821	18,612
Net earnings per share:
Basic (in dollars per share)	$ 0.14us-gaap_EarningsPerShareBasic	$ 0.19us-gaap_EarningsPerShareBasic	$ 0.36us-gaap_EarningsPerShareBasic	$ 0.34us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.14us-gaap_EarningsPerShareDiluted	$ 0.19us-gaap_EarningsPerShareDiluted	$ 0.36us-gaap_EarningsPerShareDiluted	$ 0.34us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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