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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 |  |  |

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- 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 -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- 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 + Details
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- 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 + Details
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- 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 + Details
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