MARKET SECTORS AND MAJOR CUSTOMERS - Narrative (Details) - customer	3 Months Ended
	Dec. 27, 2019	Dec. 28, 2018
Concentration Risk [Line Items]
Concentration risk, number of customers	3	2
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers	2	2
Concentration risk, percentage	38.00%	38.00%
Customer Number Two [Member] | Customer Concentration Risk [Member] | Sales [Member] | Medical
Concentration Risk [Line Items]
Concentration risk, number of customers	1	1
Concentration risk, percentage		14.00%
Customer Number One [Member] | Customer Concentration Risk [Member] | Sales [Member] | Aerospace and Defense [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers	2	1
Concentration risk, percentage	27.00%	18.00%