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Revenue from Contract with Customers (Tables)

12 Months Ended

Mar. 26, 2021

Revenue from Contract with Customer [Abstract]

Net Sales by Core End Market and Application

Net sales by core end market and application:

									Fiscal Year Ended
															March 26, 2021						March 27, 2020
Core end market:
Automotive															$	398,298					$	395,277
Industrial															94,872						78,399
Other															98,037						68,622
Other applications:
Wafer foundry products															—						72,370
Distribution of Sanken products															—						35,421
Total net sales															$	591,207					$	650,089

Revenue from External Customers by Products and Services

Net sales by product:

									Fiscal Year Ended
															March 26, 2021						March 27, 2020
Power integrated circuits (“PIC”)															$	203,600					$	165,911
Magnetic sensors (“MS”)															386,372						376,387
Photonics															1,235						—
Wafer foundry products															—						72,370
Distribution of Sanken products															—						35,421
Total net sales															$	591,207					$	650,089

Revenue from External Customers by Geographic Areas

Net sales by geography:

									Fiscal Year Ended
															March 26, 2021						March 27, 2020
Americas:
United States															$	82,165					$	119,139
Other Americas															16,558						20,883
EMEA:
Europe															103,128						110,126
Asia:
Japan															104,661						184,557
Greater China															157,546						121,807
South Korea															62,075						54,707
Other Asia															65,074						38,870
Total net sales															$	591,207					$	650,089

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

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- Definition

Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
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- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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