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Fair Value Measurements (Details) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Forward Foreign Currency Exchange Contracts [Member] | Dec. 31, 2011 Forward Foreign Currency Exchange Contracts [Member] | Dec. 31, 2012 Forward Foreign Currency Exchange Contracts [Member] | Dec. 31, 2011 Forward Foreign Currency Exchange Contracts [Member] | Dec. 31, 2012 Warrant Liability [Member] | Dec. 31, 2012 Warrant Liability [Member] | Dec. 31, 2012 Supplier Warrant [Member] | Dec. 31, 2012 Cerberus Warrant [Member] | Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] | Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] | Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 1 [Member] | Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 1 [Member] | Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member] | Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member] | Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member] | Mar. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member]
Short-term Investments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  |  |  |  |  |  |  |  |  |  |  |  | $ 383,000 | $ 342,000 | $ 383,000 | $ 342,000 | $ 0 | $ 0 | $ 0 | $ 0
Prepaid expenses and other current assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward foreign currency exchange contracts |  |  |  |  |  |  |  |  |  |  |  |  | 239,000 | 0 | 0 | 0 | 239,000 | 0 | 0 | 0
Other current liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation |  |  |  |  |  |  |  |  |  |  |  |  | 383,000 | 342,000 | 383,000 | 342,000 | 0 | 0 | 0 | 0
Forward foreign currency exchange contracts |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 121,000 | 0 | 0 | 0 | 121,000 | 0 | 0
Other liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liability |  |  |  |  |  |  |  |  |  |  |  |  | 2,450,000 | 0 | 0 | 0 | 0 | 0 | 2,450,000 | 0
Net gain (loss) on forward foreign currency exchange contracts |  |  |  |  | 20,000 | 488,000 | 360,000 | (1,399,000) |  |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions of warrants [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate (in hundredths) |  |  |  |  |  |  |  |  |  |  | 0.68% | 0.63% |  |  |  |  |  |  |  |
Expected life |  |  |  |  |  |  |  |  |  |  | 4 years 9 months | 4 years 4 months 24 days |  |  |  |  |  |  |  |
Expected volatility (in hundredths) |  |  |  |  |  |  |  |  |  |  | 55.20% | 54.85% |  |  |  |  |  |  |  |
Dividend yield (in hundredths) |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |
Probability of future financing (in hundredths) |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Rollforward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | 1,568,000 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Newly issued | 0 | 0 | 1,625,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total (gain) loss included in net loss (gain) | 882,000 | 0 | 825,000 | 0 |  |  |  |  | 882,000 | 825,000 |  |  |  |  |  |  |  |  |  |
Warrants exercised | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net transfers in (out) of Level 3 | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance | $ 2,450,000 | $ 0 | $ 2,450,000 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Percentage of likelihood of future financing, used as an input to measure fair value. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of warrant liability as of the balance sheet date. + References No definition available. + Details
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- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in earnings, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(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 Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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