v2.4.0.6

Segment Information (Schedule Of Segment Revenue From Product Lines) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 26, 2011 | Mar. 27, 2010
Segment Reporting Information [Line Items] |  |  |
Product revenue | $ 426,843 | $ 369,571 | $ 220,989
Audio Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Product revenue | 350,743 | 264,840 | 153,661
Energy Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Product revenue | $ 76,100 | $ 104,731 | $ 67,328

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration