Note 6 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Amortization of Intangible Assets, Total	$ 1,300,000	$ 1,200,000	$ 1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	1,100,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	924,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	809,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	770,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 705,000