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Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | $ 11,967 | $ 12,183
Intangible assets, Accumulated Amortization | (9,218) | (8,411)
Intangible assets, Net Book Value | 2,749 | 3,772
Licenses [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 5,349 | 5,360
Intangible assets, Accumulated Amortization | (3,366) | (2,689)
Intangible assets, Net Book Value | 1,983 | 2,671
Intangible assets, Estimated Useful Life | 7 years |
Trade Names And Trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 1,165 | 1,212
Intangible assets, Accumulated Amortization | (1,040) | (909)
Intangible assets, Net Book Value | 125 | 303
Intangible assets, Estimated Useful Life | 7 years |
Core Technology And Know How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 5,453 | 5,611
Intangible assets, Accumulated Amortization | (4,812) | (4,813)
Intangible assets, Net Book Value | $ 641 | $ 798
Minimum [Member] | Core Technology And Know How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Estimated Useful Life | 5 years |
Maximum [Member] | Core Technology And Know How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Estimated Useful Life | 10 years |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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