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Note 3 - Investments in Associated Companies - Summarized Financial Results (Details) - USD ($)
 3 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Revenue from Contract with Customer, Including Assessed Tax $ 211,817,000 $ 122,343,000
Operating expenses 192,752,000 105,606,000
Operating income 15,902,000 5,320,000
Equity in earnings 1,743,000 1,569,000
Restructuring Charges, Total 3,167,000 1,632,000
Depreciation and amortization 10,441,000 6,719,000
Operating income 20,808,000 18,306,000
Net income 16,403,000 5,717,000
TNI Partners [Member]    
Revenue from Contract with Customer, Including Assessed Tax 9,400,000 10,195,000
Operating expenses 7,005,000 8,165,000
Operating income 2,395,000 2,030,000
Company's 50% share of operating income 1,198,000 1,015,000
Less amortization of intangible assets 0 104,000
Equity in earnings 1,198,000 911,000
Madison Newspapers, Inc. [Member]    
Revenue from Contract with Customer, Including Assessed Tax 11,922,000 13,925,000
Operating expenses 10,430,000 12,120,000
Equity in earnings 545,000 658,000
Restructuring Charges, Total 106,000 0
Depreciation and amortization 110,000 145,000
Operating income 1,276,000 1,660,000
Net income $ 1,089,000 $ 1,316,000