Income Taxes - Reconciliation of Provision for Income Taxes to Amount Computed by Applying Statutory Federal Income Tax Rate to Income before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 04, 2014	Mar. 29, 2013	Mar. 30, 2012
Income Tax Disclosure [Abstract]
Tax benefit at federal statutory rate	$ (12,132)	$ (31,737)	$ (2,128)
State tax provision, net of federal benefit	(3,555)	(3,202)	26
Tax credits, net of valuation allowance	(13,149)	(17,171)	(12,887)
Manufacturing deduction			176
Non-deductible compensation	1,337	1,305	700
Non-deductible meals and entertainment	678	448	447
Other	874	303	15
Total benefit from income taxes	$ (25,947)	$ (50,054)	$ (13,651)

Income Taxes - Reconciliation of Provision for Income Taxes to Amount Computed by Applying Statutory Federal Income Tax Rate to Income before Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Apr. 04, 2014

Mar. 29, 2013

Mar. 30, 2012

Income Tax Disclosure [Abstract]

Tax benefit at federal statutory rate

$ (12,132)

$ (31,737)

$ (2,128)

State tax provision, net of federal benefit

(3,555)

(3,202)

Tax credits, net of valuation allowance

(13,149)

(17,171)

(12,887)

Manufacturing deduction

176

Non-deductible compensation

1,337

1,305

700

Non-deductible meals and entertainment

678

448

447

Other

874

303

Total benefit from income taxes

$ (25,947)

$ (50,054)

$ (13,651)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to differences in the deductibility of incentive stock options, other equity-based compensation costs and non-allowable compensation related cost in accordance with generally accepted accounting principles and enacted tax laws.

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