Note 3 Intangibles Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2017	Oct. 01, 2016
Goodwill [Roll Forward]
Goodwill - beginning of year	$ 59,126	$ 26,617
Additions	0	32,509
Goodwill - end of year	59,126	59,126
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning of year	16,498	16,588
Additions	0	7,330
Amortization	7,280	7,420
Intangible assets - end of year	$ 9,218	$ 16,498
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible Asset, Useful Life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible Asset, Useful Life	5 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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