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Note 3 - Investments in Associated Companies (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 28, 2020 | Jun. 30, 2019 | Jun. 28, 2020 | Jun. 30, 2019
TNI Partners [Member] |  |  |  |
Proceeds from Equity Method Investment, Distribution | $ 959,000 | $ 731,000 | $ 2,650,000 | $ 3,328,000
MNI [Member] |  |  |  |
Proceeds from Equity Method Investment, Distribution | $ 0 | $ 850,000 | $ 1,000,000 | $ 2,350,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 50.00% |  | 50.00% |

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