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v3.21.1

Summary of Significant Accounting Policies (Narrative) (Details) shares in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 28, 2020 USD ($) | Mar. 30, 2019 USD ($) | Mar. 27, 2021 USD ($) customer shares | Mar. 28, 2020 USD ($) customer shares | Mar. 30, 2019 USD ($) customer shares
Inventory Disclosure [Abstract] |  |  |  |  |
Inventory write-down |  |  | $ 1,200,000 | $ 2,800,000 |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Gain on sale of assets |  | $ 4,900,000 | 0 | 0 | $ 4,913,000
Equipment disposal charges, net of recovery | $ 9,600,000 |  | 130,000 | 9,578,000 |
Depreciation and amortization expense on property, plant and equipment |  |  | 24,900,000 | 31,900,000 | 32,000,000.0
Intangible Assets, Net (Including Goodwill) [Abstract] |  |  |  |  |
Impairment of goodwill |  |  | 0 | 0 | 0
Impairment and write-off of intangible assets | $ 10,000,000.0 |  | 0 | 9,961,000 | 0
Marketing and Advertising Expense [Abstract] |  |  |  |  |
Advertising costs |  |  | $ 900,000 | $ 900,000 | $ 1,000,000.0
Earnings Per Share [Abstract] |  |  |  |  |
Weighted outstanding options excluded from diluted calculation (in shares) | shares |  |  | 187 | 543 | 872
Henan Fuchi | Accounts Receivable |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Concentration risk, percentage |  |  | 25.00% |  |
Hongfujin Precision | Accounts Receivable |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Concentration risk, percentage |  |  |  | 29.00% |
Pegatron | Accounts Receivable |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Concentration risk, percentage |  |  |  | 20.00% |
Ten Largest Customers | Customer Concentration Risk |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Number of customers responsible for sales concentration | customer |  |  | 10 | 10 | 10
Ten Largest Customers | Sales Revenue, Net | Customer Concentration Risk |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Concentration risk, percentage |  |  | 93.00% | 93.00% | 91.00%
Apple, Inc. | Sales Revenue, Net | Customer Concentration Risk |  |  |  |  |
Concentration Of Credit Risk [Abstract] |  |  |  |  |
Concentration risk, percentage |  |  | 83.00% | 79.00% | 78.00%
Capitalized Software |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 3 years |  |
Capitalized Enterprise Resource Planning Software |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 10 years |  |
Minimum |  |  |  |  |
Intangible Assets, Net (Including Goodwill) [Abstract] |  |  |  |  |
Intangible assets, useful life |  |  | 1 year |  |
Acquired intangible assets, useful life |  |  | 1 year |  |
Revenue, Performance Obligation [Abstract] |  |  |  |  |
Warranty period |  |  | 1 year |  |
Contract Balance Payment Terms [Abstract] |  |  |  |  |
Contract balance, payment term |  |  | 30 days |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share-based compensation, vesting period |  |  | 0 years |  |
Minimum | Property, Plant and Equipment |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 3 years |  |
Minimum | Furniture, Fixtures, Machinery and Equipment |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 3 years |  |
Maximum |  |  |  |  |
Intangible Assets, Net (Including Goodwill) [Abstract] |  |  |  |  |
Intangible assets, useful life |  |  | 10 years |  |
Acquired intangible assets, useful life |  |  | 15 years |  |
Revenue, Performance Obligation [Abstract] |  |  |  |  |
Warranty period |  |  | 3 years |  |
Contract Balance Payment Terms [Abstract] |  |  |  |  |
Contract balance, payment term |  |  | 60 days |  |
Share-based Compensation [Abstract] |  |  |  |  |
Share-based compensation, vesting period |  |  | 4 years |  |
Maximum | Property, Plant and Equipment |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 39 years |  |
Maximum | Furniture, Fixtures, Machinery and Equipment |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 10 years |  |
Maximum | Buildings |  |  |  |  |
Property, Plant and Equipment, Net [Abstract] |  |  |  |  |
Estimated useful life |  |  | 39 years |  |

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