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Revenue from Contract with Customers - Net Sales by Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 25, 2021	Jun. 26, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 188,142	$ 115,001
Power integrated circuits
Disaggregation of Revenue [Line Items]
Total net sales	66,672	41,599
Magnetic sensors
Disaggregation of Revenue [Line Items]
Total net sales	120,642	73,402
Photonics
Disaggregation of Revenue [Line Items]
Total net sales	$ 828	$ 0

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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