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Note 11 - Fair Value Measurements (Details Textual) - USD ($)
Dec. 29, 2019
Sep. 29, 2019
Mar. 31, 2014
Long-term Debt, Total $ 421,248,000 $ 429,391,000  
Fair Value, Inputs, Level 3 [Member]      
Investments, Fair Value Disclosure, Total 6,068,000    
Equity Securities without Readily Determinable Fair Value, Amount 10,268,000    
Fair Value, Inputs, Level 3 [Member] | Senior Secured Notes [Member]      
Long-term Debt, Total $ 356,141,000    
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 $ 178,000 $ 1,195,000 $ 16,930,000
Fair Value, Inputs, Level 2 [Member] | Senior Secured Notes [Member]      
Long-term Debt, Fair Value 344,789,000    
Fair Value, Inputs, Level 2 [Member] | Second Lien Term Loan [Member]      
Long-term Debt, Total 77,253,000    
Long-term Debt, Fair Value $ 76,481,000