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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Summary of Significant Accounting Policies (Narrative) (Details) shares in Thousands	3 Months Ended	12 Months Ended
	Mar. 25, 2017 USD ($)	Mar. 31, 2018 USD ($) customer shares	Mar. 25, 2017 USD ($) shares	Mar. 26, 2016 USD ($) shares
Inventory write-down		$ 9,700,000	$ 6,700,000
Asset impairment	$ 9,800,000	0	9,842,000	$ 0
Depreciation and amortization expense on property, plant and equipment		27,700,000	26,100,000	22,300,000
Impairment of goodwill		0	0	0
Advertising costs		$ 1,400,000	$ 1,700,000	$ 1,600,000
Weighted outstanding options excluded from diluted calculation (in shares) \| shares		326	389	468
Pegatron \| Accounts Receivable
Concentration risk, percentage		24.00%
Jabil Circuits \| Accounts Receivable
Concentration risk, percentage		18.00%	13.00%
Hongfujin Precision \| Accounts Receivable
Concentration risk, percentage		11.00%	20.00%
Protek \| Accounts Receivable
Concentration risk, percentage			15.00%
Customer Concentration Risk \| Ten Largest Customers
Number of customers responsible for sales concentration \| customer		10
Customer Concentration Risk \| Ten Largest Customers \| Sales Revenue, Net
Concentration risk, percentage		92.00%	92.00%	89.00%
Customer Concentration Risk \| Apple, Inc. \| Sales Revenue, Net
Concentration risk, percentage		81.00%	79.00%	66.00%
Customer Concentration Risk \| Samsung Electronics \| Sales Revenue, Net
Concentration risk, percentage				15.00%
Maximum
Intangible assets, useful life		10 years
Acquired intangible assets, useful life		15 years
Share-based compensation, vesting period		4 years
Minimum
Intangible assets, useful life		1 year
Acquired intangible assets, useful life		1 year
Share-based compensation, vesting period		0 years
Property, Plant and Equipment \| Maximum
Estimated useful life		39 years
Property, Plant and Equipment \| Minimum
Estimated useful life		3 years
Furniture, Fixtures, Machinery and Equipment \| Maximum
Estimated useful life		10 years
Furniture, Fixtures, Machinery and Equipment \| Minimum
Estimated useful life		3 years
Buildings \| Maximum
Estimated useful life		39 years
Capitalized Software
Estimated useful life		3 years
Capitalized Enterprise Resource Planning Software
Estimated useful life		10 years
Accounting Standards Update 2016-16
Cumulative effect of adoption of new ASU	747,000		$ 747,000
Retained Earnings [Member] \| Accounting Standards Update 2016-16
Cumulative effect of adoption of new ASU	$ 747,000		$ 747,000