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Note 6 - Debt - Debt (Details) - USD ($)	Sep. 27, 2020	Mar. 16, 2020	Sep. 29, 2019	Mar. 31, 2014
Long-term debt, gross	$ 538,290,000	$ 431,502,000	$ 443,627,000
Interest rate
Unamortized debt issue costs	$ 0		(11,282,000)
Less current maturities of long-term debt	13,733,000		2,954,000
Total long-term debt	524,557,000		429,391,000
Revolving Credit Facility [Member]
Long-term debt, gross	$ 0		0
Interest rate	0.00%
Term Loan [Member]
Long-term debt, gross	$ 538,290,000		0
Interest rate	9.00%
First Lien Credit Facility [Member]
Long-term debt, gross	$ 0		0
Interest rate	0.00%
Senior Secured Notes [Member]
Long-term debt, gross	$ 0		363,420,000
Interest rate	0.00%			9.50%
Second Lien Term Loan [Member]
Long-term debt, gross	$ 0		$ 80,207,000
Interest rate	0.00%