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Note 12 - Fair Value of Financial Instruments (Details Textual) - USD ($)	12 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 24, 2017	Mar. 31, 2014
Fair Value Adjustment of Warrants	$ (612,000)	$ 226,000	$ (10,181,000)
Senior Secured Notes [Member]
Debt Instrument, Face Amount	363,420,000			$ 400,000,000
2st Lien Agreement [Member]
Debt Instrument, Face Amount	$ 80,207,000
TCT [Member]
Equity Securities Without Readily Determinable Fair Value, Ownership Percentage of Voting Common Stock	0.70%
Ownership Percentage of Total Common Stock	8.70%
Fair Value, Inputs, Level 3 [Member]
Investments, Fair Value Disclosure, Total	$ 6,068,000
Equity Securities without Readily Determinable Fair Value, Amount	$ 10,269,000
Fair Value, Inputs, Level 3 [Member] | TCT and Private Equity Investment [Member]
Equity Securities without Readily Determinable Fair Value, Percent	16.70%
Fair Value, Inputs, Level 2 [Member]
Warrants and Rights Outstanding	$ 1,195,000	$ 1,807,000	$ 1,580,000	$ 16,930,000
Fair Value, Inputs, Level 2 [Member] | Senior Secured Notes [Member]
Long-term Debt, Fair Value	364,328,550
Fair Value, Inputs, Level 2 [Member] | Second Lien Term Loan [Member]
Long-term Debt, Fair Value	$ 80,207,214

X

- Definition

The ownership percentage of voting common stock in equity security without readily determinable fair value.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

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X

- Definition

The percentage ownership of total common stock.

+ References

No definition available.

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X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117539-209714

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X

- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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X

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

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X

- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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