Note 4 - Goodwill and Other Intangible Assets (Details Textual)		3 Months Ended	6 Months Ended
Mar. 29, 2020 USD ($)	Mar. 29, 2020 USD ($)	Mar. 29, 2020 USD ($)
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 26,965,000	$ 26,965,000	$ 26,965,000
Finite-Lived Intangible Asset, Expected Amortization, Year Two	24,382,000	24,382,000	24,382,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	23,393,000	23,393,000	23,393,000
Finite-Lived Intangible Asset, Expected Amortization, Year Four	22,614,000	22,614,000	22,614,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	20,355,000	$ 20,355,000	20,355,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)		9 years 73 days
Goodwill, Acquired During Period	63,559,000		63,559,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 28,118,000	$ 28,118,000	$ 28,118,000
Weighted Average [Member]
Finite-Lived Intangible Assets, Weighted Amortization Period (Year)		6 years 146 days
Advertiser Relationships [Member] \| Weighted Average [Member]
Finite-Lived Intangible Assets, Weighted Amortization Period (Year)		5 years 146 days
Customer Relationships [Member] \| Weighted Average [Member]
Finite-Lived Intangible Assets, Weighted Amortization Period (Year)		4 years 328 days
Subscriber Relationships [Member] \| Weighted Average [Member]
Finite-Lived Intangible Assets, Weighted Amortization Period (Year)		8 years 255 days

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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