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Income Taxes (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Mar. 29, 2014 | Mar. 30, 2013
Income Taxes [Line Items] |  |
Increase (decrease) in valuation allowance | $ 8,900,000 | $ (5,800,000)
Net operating loss included in deferred tax assets | 29,062,000 | 28,162,000
Net operating loss included in deferred tax assets, before tax effect | 61,200,000 |
Net operating loss included in deferred tax asset, net of valuation allowance | 8,800,000 |
Excess stock deductions | 110,000,000 |
Tax credit carryforward under with and without method | 612,000 |
Undistributed earnings in non-U.S subsidiaries | 307,000 |
Unrecognized deferred tax liability | 109,000 |
Unrecognized tax benefit | 0 | 0
Accrued interest and penalties | 0 |
Interest and penalties incurred during period | 0 | 0
Federal [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss included in deferred tax assets | 21,400,000 |
Net operating loss carryforwards | 81,300,000 |
Section 382 Of Internal Revenue Code [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards | 29,500,000 |
Non-U.S [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards | 2,200,000 |
State [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards | 94,000,000 |
Research Tax Credit Carryforward [Member] | Federal [Member] |  |
Income Taxes [Line Items] |  |
Tax credit carryforward | 21,000,000 |
Research Tax Credit Carryforward [Member] | State [Member] |  |
Income Taxes [Line Items] |  |
Tax credit carryforward | 14,500,000 |
Tax credit carryforward subject to expiration | 2,800,000 |
Tax credit carryforward not subject to expiration | $ 11,700,000 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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