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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Mar. 31, 2012 | Mar. 31, 2011
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | $ 12,183 | $ 19,068
Intangible assets, Accumulated Amortization | (8,411) | (12,014)
Intangible assets, Net Book Value | 3,772 | 7,054
Licenses [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 5,360 | 2,908
Intangible assets, Accumulated Amortization | (2,689) | (2,100)
Intangible assets, Net Book Value | 2,671 | 808
Intangible assets, Estimated Useful Life (in years) | 7 |
Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount |  | 9,038
Intangible assets, Accumulated Amortization |  | (4,891)
Intangible assets, Net Book Value |  | 4,147
Intangible assets, Estimated Useful Life (in years) | 7 |
Trade Names And Trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 1,212 | 1,281
Intangible assets, Accumulated Amortization | (909) | (778)
Intangible assets, Net Book Value | 303 | 503
Intangible assets, Estimated Useful Life (in years) | 7 |
Core Technology And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Gross Amount | 5,611 | 5,841
Intangible assets, Accumulated Amortization | (4,813) | (4,245)
Intangible assets, Net Book Value | $ 798 | $ 1,596
Minimum [Member] | Core Technology And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Estimated Useful Life (in years) | 5 |
Maximum [Member] | Core Technology And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, Estimated Useful Life (in years) | 10 |

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- Definition The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: 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of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: 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=6905858&loc=d3e16323-109275 + Details
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- Definition Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: 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. Reference 2: 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=6905858&loc=d3e16323-109275 + Details
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- Definition The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: 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. Reference 2: 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=6905858&loc=d3e16323-109275 + Details
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- Definition The useful life of all finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 12, 13, 14 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6904245&loc=d3e15372-109273 + Details
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