XML 72 R77.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Note 17 - Business Segments - Operating Results for Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Revenues | $ 17,915 | $ 14,134 | $ 45,697 | $ 41,618
Operating profit (loss) | (6,619) | 20,765 | (16,974) | 40,366
Corporate, Non-Segment [Member] |  |  |  |
Operating profit (loss) | (590) | (839) | (1,236) | (2,851)
Grid [Member] |  |  |  |
Revenues | 15,232 | 6,826 | 36,577 | 23,325
Grid [Member] | Operating Segments [Member] |  |  |  |
Operating profit (loss) | (3,732) | (2,665) | (9,723) | (8,202)
Wind [Member] |  |  |  |
Revenues | 2,683 | 7,308 | 9,120 | 18,293
Wind [Member] | Operating Segments [Member] |  |  |  |
Operating profit (loss) | $ (2,297) | $ 24,269 | $ (6,015) | $ 51,419

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=amsc_GridMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=amsc_WindMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |