Note 14 - Contingencies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018	Sep. 29, 2018
Fire [Member]
Insurance Recoveries	$ 1,400,000		$ 1,800,000
Insurance Settlements Receivable					$ 263,000	$ 462,000
Fire [Member] | Other Income [Member]
Insurance Recoveries	950,000		950,000
Fire [Member] | Cost of Sales [Member]
Insurance Recoveries	120,000		306,000
Fire [Member] | Selling, General and Administrative Expenses [Member]
Insurance Recoveries	$ 40,000		45,000
Storm [Member]
Insurance Recoveries		$ 439,000	150,000	$ 439,000
Storm [Member] | Other Income [Member]
Insurance Recoveries			$ 98,000
Storm [Member] | Cost of Sales [Member]
Insurance Recoveries				418,000
Storm [Member] | Selling, General and Administrative Expenses [Member]
Insurance Recoveries				$ 21,000