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Note 11 - Fair Value Measurements (Details Textual) - USD ($)	Jun. 27, 2021	Sep. 27, 2020	Mar. 31, 2014
Warrants and Rights Outstanding	$ 1,317,000	$ 363,000
Senior Secured Notes [Member]
Debt Instrument, Face Amount	485,162,000
Fair Value, Inputs, Level 3 [Member]
Investments, Fair Value Disclosure, Total	$ 4,226,000
Fair Value, Inputs, Level 3 [Member] | TCT and Private Equity Investment [Member]
Equity Securities without Readily Determinable Fair Value, Percent	17.00%
Fair Value, Inputs, Level 2 [Member]
Warrants and Rights Outstanding			$ 16,930,000

X

- Definition

Percent of investment in equity security without readily determinable fair value.

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Face (par) amount of debt instrument at time of issuance.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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