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Note 9 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Provision for income taxes at federal statutory rate	$ 10,444	$ 11,959	$ 19,701
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	24.50%	35.00%	35.00%
Change in federal tax rate - Tax Cuts and Jobs Act	$ (3,307)
Change in federal tax rate - Tax Cuts and Jobs Act	(7.80%)
Qualified production activities deduction	$ (832)	$ (768)	$ (1,596)
Qualified production activities deduction	(2.00%)	(2.20%)	(2.80%)
Excess tax benefits of stock-based compensation	$ (634)
Excess tax benefits of stock-based compensation	(1.50%)
Valuation allowance	$ (18)	$ (29)	$ (213)
Valuation allowance	0.00%	(0.10%)	(0.40%)
State income taxes, net of federal tax benefit	$ 739	$ 598	$ 1,093
State income taxes, net of federal tax benefit	1.70%	1.80%	1.90%
Other, net	$ (28)	$ (140)	$ 60
Other, net	0.00%	(0.50%)	0.10%
Provision for income taxes	$ 6,364	$ 11,620	$ 19,045
Provision for income taxes	14.90%	34.00%	33.80%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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