COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 28, 2020	Sep. 28, 2019	Dec. 01, 2013
Other Commitments [Line Items]
Period Of Warranty For Manufacturing Defects	1 year
Lease Expiration Year	2027
Financing obligation	$ 0	$ 14,207	$ 20,000
Current and Noncurrent Portion
Other Commitments [Line Items]
Financing obligation		$ 15,000
Building
Other Commitments [Line Items]
Property, plant and equipment, useful life	25 years