Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Estimated Useful Lives	3
Minimum [Member] | Building [Member]
Property, Plant and Equipment, Estimated Useful Lives	10
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment, Estimated Useful Lives	5
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Estimated Useful Lives	15
Maximum [Member] | Building [Member]
Property, Plant and Equipment, Estimated Useful Lives	30
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment, Estimated Useful Lives	15
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
PC Strand Operations [Member]
Asset Impairment Charges	$ 300,000
Interest Costs Capitalized	0	$ 0	$ 0
Asset Impairment Charges	543,000	0	0
Goodwill, Impairment Loss	0
Depreciation	$ 10,900,000	$ 9,800,000	$ 9,700,000
Finite-Lived Intangible Asset, Useful Life