Note 6 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Amortization of Intangible Assets	$ 1,200,000	$ 1,200,000	$ 1,100,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	918,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	705,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	537,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	414,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 414,000