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Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2021	Jul. 03, 2020	Jul. 02, 2021	Jul. 03, 2020	Oct. 02, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 152,622	$ 137,267	$ 451,709	$ 382,788
Contract liabilities	6,349		6,349		$ 9,861
Increase (decrease) in contract with customer liability			(3,512)
Amounts included in contract liabilities at the beginning of the period	100		$ 6,100
Net change in contract liabilities (percentage)			(36.00%)
Other Noncurrent Liabilities [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities	4,600		$ 4,600		$ 3,500
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue	71,370	48,035
Data Center
Disaggregation of Revenue [Line Items]
Revenue	33,257	32,432
Telecom
Disaggregation of Revenue [Line Items]
Revenue	47,995	56,800
United States
Disaggregation of Revenue [Line Items]
Revenue	70,329	53,633	206,566	163,964
China
Disaggregation of Revenue [Line Items]
Revenue	44,521	55,886	124,097	133,659
Asia Pacific, excluding China
Disaggregation of Revenue [Line Items]
Revenue	22,023	19,688	69,310	58,552
Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 15,749	$ 8,060	51,736	26,613
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue			205,078	146,586
Data Center
Disaggregation of Revenue [Line Items]
Revenue			104,832	82,153
Telecom
Disaggregation of Revenue [Line Items]
Revenue			$ 141,799	$ 154,049

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