Note 10 - Common Stock and Class B Common Stock (Details Textual) - $ / shares	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Mar. 30, 2018	Mar. 30, 2017	Jun. 29, 2012	Mar. 31, 2011
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01				$ 2.00
Class of Warrant or Right, Outstanding (in shares)	6,000,000
Common Class B [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 2	$ 2
Common Stock, Shares, Outstanding, Ending Balance (in shares)						5,600,000
Warrant Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				6,000,000
Class of Warrant or Right, Percentage of Common Stock Outstanding				10.10%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 4.19
Class of Warrant or Right, Outstanding (in shares)	363,000		16,930,000
Second Lien Term Loan [Member]
Stock Issued During Period, Shares, New Issues (in shares)	6,743,640
Percentage of Outstanding Shares, Pro Forma Basis	13.00%