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Summary of Significant Accounting Policies - Concentrations of Credit Risk and Significant Customers (Details)	12 Months Ended
	Mar. 26, 2021	Mar. 27, 2020
Trade Accounts Receivable | Customer Concentration Risk | Sanken
Concentration Risk [Line Items]
Concentration risk, percentage	22.70%	33.80%
Revenue Benchmark | Customer Concentration Risk | Sanken
Concentration Risk [Line Items]
Concentration risk, percentage	17.70%	28.40%
Revenue Benchmark | Geographic Concentration Risk | Non-US
Concentration Risk [Line Items]
Concentration risk, percentage	86.10%	81.70%
Revenue Benchmark | Geographic Concentration Risk | Japan
Concentration Risk [Line Items]
Concentration risk, percentage	17.70%	28.40%
Revenue Benchmark | Geographic Concentration Risk | Greater China
Concentration Risk [Line Items]
Concentration risk, percentage	26.60%	18.70%
Revenue Benchmark | Geographic Concentration Risk | South Korea
Concentration Risk [Line Items]
Concentration risk, percentage	10.50%

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