Note 3 - Investments in Associated Companies (Details Textual) - USD ($)	3 Months Ended
Dec. 29, 2019	Dec. 30, 2018
TNI Partners [Member]
Proceeds from Equity Method Investment, Distribution	$ 738,000	$ 549,000
MNI [Member]
Proceeds from Equity Method Investment, Distribution	$ 0	$ 750,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	50.00%

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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