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REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023	Sep. 29, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 181,234	$ 169,406	$ 338,382	$ 349,510
Contract liabilities	5,214		5,214		$ 2,762
Increase (decrease) in contract with customer liability			2,452
Amounts included in contract liabilities at the beginning of the period	100		$ 2,500
Net change in contract liabilities (percentage)			89.00%
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue	43,147	38,324
Data Center
Disaggregation of Revenue [Line Items]
Revenue	47,200	53,888
Telecom
Disaggregation of Revenue [Line Items]
Revenue	90,887	77,194
United States
Disaggregation of Revenue [Line Items]
Revenue	80,161	82,835	$ 149,806	171,423
China
Disaggregation of Revenue [Line Items]
Revenue	46,190	33,325	82,538	74,481
Asia Pacific, excluding China
Disaggregation of Revenue [Line Items]
Revenue	26,663	28,008	40,671	49,542
Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 28,220	$ 25,238	65,367	54,064
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue			92,659	79,810
Data Center
Disaggregation of Revenue [Line Items]
Revenue			77,838	115,337
Telecom
Disaggregation of Revenue [Line Items]
Revenue			$ 167,885	$ 154,363

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