Note 2 - Revenue (Details Textual) - USD ($)	3 Months Ended
	Dec. 29, 2019	Sep. 29, 2019
Contract with Customer, Liability, Current	$ 22,966,000	$ 21,720,000
Contract with Customer, Liability, Revenue Recognized	13,399,000
Contract with Customer, Asset, Net, Current, Total	3,589,000	1,107,000
Accounts Receivable, before Allowance for Credit Loss	53,481,000	47,863,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 6,420,000	$ 6,434,000