Note 3 - Revenue (Details Textual) - USD ($)	12 Months Ended			24 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 29, 2019	Sep. 26, 2021	Sep. 30, 2018
Revenue from Contract with Customer, Including Assessed Tax	$ 794,649,000	$ 618,004,000	$ 509,854,000
Contract with Customer, Liability, Current	61,404,000	60,271,000		$ 61,404,000
Contract with Customer, Liability, Revenue Recognized				56,139,000
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total	0	0	1,107,000	0
Accounts Receivable, before Allowance for Credit Loss	71,644,000	66,029,000		71,644,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance	6,574,000	13,431,000	6,434,000	$ 6,574,000	$ 4,806,000
Digital Advertising [Member]
Revenue from Contract with Customer, Including Assessed Tax	138,734,000	106,491,000	100,007,000
Digital Subscription Revenue [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 95,794,000	$ 37,336,000	$ 25,002,000