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Note 5 - Debt - Payments (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Jun. 24, 2018
Mar. 25, 2018
Dec. 24, 2017
Second Lien Term Loan [Member]        
September 30, 2018 $ 3,931 $ 7,317 $ 1,377 $ 724