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Summary of Significant Accounting Policies - Additional Disclosures (Details) $ in Thousands | 12 Months Ended
--- | ---
Mar. 28, 2020 USD ($) item | Mar. 30, 2019 USD ($) item | Mar. 31, 2018 USD ($) item
Advertising Costs |  |  |
Prepaid advertising | $ 239 | $ 413 |
Advertising expense | 28,000 | 27,700 | $ 25,500
Income Taxes |  |  |
Accrued interest and penalties | 0 | $ 0 |
Fair Value of Certain Financial Assets and Liabilities |  |  |
Financial assets requiring fair value measurements on a recurring basis | 0 |  |
Financial liabilities requiring fair value measurements on a recurring basis | $ 0 |  |
Supplier Concentration Risk | Sales Revenue |  |  |
Supplier Concentration Risk |  |  |
Number of largest suppliers | item | 3 | 3 | 3
Concentration risk percentage | 36.00% | 39.00% | 40.00%

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