Note 7 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Amortization of Intangible Assets, Total	$ 1,100,000	$ 1,300,000	$ 1,200,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	924,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	809,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	770,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	705,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 699,000