XML 40 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Marketable Securities And Fair Value Disclosures (Tables) | 12 Months Ended
--- | ---
Mar. 31, 2013
Marketable Securities And Fair Value Disclosures [Abstract] |
Summary Of Marketable Securities |
|  | Cost at |  | Gross Unrealized |  | Gross Unrealized |  | Fair Market Value
|  | March 31, 2013 |  | Gains |  | Losses |  | at March 31, 2013
Short-term commercial paper | $ | - | $ | - | $ | - | $ | -
|  | Cost at |  | Gross Unrealized |  | Gross Unrealized |  | Fair Market Value
|  | March 31, 2012 |  | Gains |  | Losses |  | at March 31, 2012
Short-term commercial paper | $ | 5,276 | $ | 28 | $ | - | $ | 5,304
Schedule Of Assets And Liabilities Carried At Fair Value |
|  | Total |  | Quoted Prices in |  | Significant Other |  | Significant
|  | Carrying |  | Active Markets |  | Observable Inputs |  | Unobservable Inputs
|  | Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
March 31, 2013: |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Cash equivalents | $ | 18,649 | $ | 18,649 | $ | - | $ | -
Liabilities: |  |  |  |  |  |  |  |
Derivative liability | $ | 529 | $ | - | $ | - | $ | 529
Warrants | $ | 3,633 | $ | - | $ | - | $ | 3,633
|  | Total |  | Quoted Prices in |  | Significant Other |  | Significant
|  | Carrying |  | Active Markets |  | Observable Inputs |  | Unobservable Inputs
|  | Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
March 31, 2012: |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Cash equivalents | $ | 23,485 | $ | 23,485 | $ | - | $ | -
Short-term commercial paper | $ | 5,304 | $ | - | $ | 5,304 | $ | -
Schedule Of The Major Classes Of Liabilities Measured At Fair Value |
|  | Derivative |  |  |
|  | Liability |  |  | Warrants
April 1, 2012 | $ | - |  | $ | -
Valuation of original derivative liability |  | 3,779 |  |  | -
Warrant issuance with Senior Convertible Note |  | - |  |  | 7,018
Warrant issuance with Senior Secured Term Loan |  | - |  |  | 380
Valuation of derivative liability attributable to modification |  | 542 |  |  | -
Mark to market adjustment |  | (3,792) |  |  | (3,765)
Balance at March 31, 2013 | $ | 529 |  | $ | 3,633

X
- Definition Schedule of liabilities measured at fair value. + References No definition available. + Details
Name: | amsc_ScheduleOfLiabilitiesMeasuredAtFairValueTableTextBlock
Namespace Prefix: | amsc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph d -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 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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1),(d) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration