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Summary of Significant Accounting Policies - Concentrations of Credit Risk and Significant Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 24, 2021	Sep. 25, 2020	Sep. 24, 2021	Sep. 25, 2020	Mar. 26, 2021	Mar. 27, 2021
Concentration Risk [Line Items]
Operating lease right-of-use assets	$ 17,054		$ 17,054		$ 0
Total operating lease liabilities	$ 17,316		$ 17,316
Accounting Standards Update 2016-02
Concentration Risk [Line Items]
Operating lease right-of-use assets						$ 18,403
Total operating lease liabilities						$ 18,759
Revenue Benchmark | Geographic Concentration Risk | Non-US
Concentration Risk [Line Items]
Concentration risk, percentage	85.60%	84.70%	85.70%	86.50%
Revenue Benchmark | Geographic Concentration Risk | Greater China
Concentration Risk [Line Items]
Concentration risk, percentage	26.20%	27.80%	24.50%	27.80%
Revenue Benchmark | Geographic Concentration Risk | Japan
Concentration Risk [Line Items]
Concentration risk, percentage	19.20%	16.40%	19.00%	18.30%
Revenue Benchmark | Geographic Concentration Risk | South Korea
Concentration Risk [Line Items]
Concentration risk, percentage	10.20%		10.90%	10.40%
Sanken | Trade Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage			24.30%		22.70%
Sanken | Revenue Benchmark | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	19.20%	16.50%	19.00%	18.30%

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Present value of lessee's discounted obligation for lease payments from operating lease.

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