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Related Party Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jun. 30, 2018	Jun. 25, 2021	Jun. 26, 2020	Mar. 26, 2021	May 31, 2018
Related Party Transaction [Line Items]
Total net sales		$ 188,142	$ 115,001
Trade accounts receivable from related party		23,547		$ 23,634
Amounts due to related party		4,095		2,353
Rent expense		1,235	1,183
Related Party Revenue
Related Party Transaction [Line Items]
Total net sales		35,453	23,620
Sanken
Related Party Transaction [Line Items]
Trade accounts receivable from related party		23,545		21,595
Other accounts receivable from related party		$ 110		198
Option to terminate, period of notice		6 months
Rent expense		$ 56	57
Sanken | Related Party Revenue
Related Party Transaction [Line Items]
Total net sales		35,453	23,620
PSL
Related Party Transaction [Line Items]
Amounts due to related party		4,119		1,739
Purchases from related party		13,380	11,923
PSL | IC Technology Development Agreement
Related Party Transaction [Line Items]
Fees received		0	0
Fees paid		0	0
PSL | Discrete Technology Development Agreement
Related Party Transaction [Line Items]
Amounts due to related party				614
PSL | Price Support Payment
Related Party Transaction [Line Items]
Purchases from related party		0	1,800
Sanken Electric Europe Ltd.
Related Party Transaction [Line Items]
Trade accounts receivable from related party		16		$ 1,272
Director
Related Party Transaction [Line Items]
Fees paid		$ 56	$ 90
Monthly fee payable	$ 19				$ 30
Signing fee	54
Severance payment if terminated	$ 180
Accelerated vesting, acceleration period	6 months
Director | Common Class L
Related Party Transaction [Line Items]
Shares granted (in shares)	12,000,000

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