Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document And Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Note K - Business Segments (Details Textual)

v3.20.2

Note K - Business Segments (Details Textual) $ in Thousands	3 Months Ended			9 Months Ended
Note K - Business Segments (Details Textual) $ in Thousands	Jun. 27, 2020 USD ($)	Mar. 28, 2020 USD ($)	Dec. 29, 2018 USD ($)	Jun. 27, 2020 USD ($)	Sep. 28, 2019 USD ($)
Number of Operating Segments				2
Assets, Total	$ 410,432			$ 410,432	$ 377,988
Delta Group [Member]
Litigation Settlement, Expense			$ 2,500
Increase (Decrease} in Assets				17,200
Assets, Total	332,900			332,900
Delta Group [Member] \| COVID-19 [Member]
Operating Expenses, Total	23,100			25,000
Delta Group [Member] \| COVID-19 [Member] \| Sales [Member]
Operating Expenses, Total		$ 500
Delta Group [Member] \| COVID-19 [Member] \| Cost of Sales [Member]
Operating Expenses, Total		12,100
Delta Group [Member] \| COVID-19 [Member] \| Selling, General and Administrative Expenses [Member]
Operating Expenses, Total		2,400
Delta Group [Member] \| COVID-19 [Member] \| Other Operating Income (Expense) [Member]
Operating Expenses, Total		8,100
Delta Group [Member] \| COVID-19 [Member] \| Curtailment of Manufacturing Operations [Member]
Operating Expenses, Total		9,800
Delta Group [Member] \| COVID-19 [Member] \| Curtailment of Manufacturing Operations [Member] \| Cost of Sales [Member]
Operating Expenses, Total				1,900
Delta Group [Member] \| COVID-19 [Member] \| Incremental Costs to Right Size Production [Member]
Operating Expenses, Total		2,600
Delta Group [Member] \| COVID-19 [Member] \| Increased Accounts Receivable and Inventory Reserves Related to the Heightened Market Risks [Member]
Operating Expenses, Total		6,600
Delta Group [Member] \| COVID-19 [Member] \| Other Expenses [Member]
Operating Expenses, Total		$ 4,100
Salt Life Group [Member]
Gain (Loss) Related to Litigation Settlement, Total	1,300
Increase (Decrease} in Assets				9,000
Assets, Total	$ 66,500			$ 66,500

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