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Note 3 - Investments in Associated Companies (Details Textual) - TNI Partners [Member] - USD ($)
3 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Proceeds from Equity Method Investment, Distribution $ 1,056,000 $ 738,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 50.00%