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Note 5 - Debt (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
Note 5 - Debt (Details Textual) - USD ($)	Mar. 16, 2020	Mar. 27, 2022	Dec. 26, 2021	Mar. 27, 2022	Mar. 28, 2021	Sep. 26, 2021	Mar. 31, 2014
Repayments of Long-Term Debt, Total				$ 20,062,000	$ 39,375,000
Warrants Issued in Connection with Second Lien Term Loan [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)							600,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)							$ 41.90
Warrants and Rights Outstanding		$ 0		$ 0		$ 71,000	$ 16,930,000
Warrants Issued in Connection with Second Lien Term Loan [Member] \| Nonoperating Income (Expense) [Member]
Fair Value Adjustment of Warrants		71,000
Credit Agreement [Member] \| Secured Term Loan [Member] \| BH Finance [Member]
Debt Instrument, Term (Year)	25 years
Debt Instrument, Face Amount	$ 462,554,000
Debt Instrument, Interest Rate, Stated Percentage	9.00%
Repayments of Long-Term Debt, Total		$ 0	$ 20,062,000