XML 30 R62.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business Segments - Operating Results for Two Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 21,250us-gaap_SalesRevenueNet	$ 20,563us-gaap_SalesRevenueNet	$ 45,401us-gaap_SalesRevenueNet	$ 67,830us-gaap_SalesRevenueNet
Operating profit (loss)	(7,735)us-gaap_OperatingIncomeLoss	(6,675)us-gaap_OperatingIncomeLoss	(46,801)us-gaap_OperatingIncomeLoss	(26,552)us-gaap_OperatingIncomeLoss
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Operating profit (loss)	(1,986)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	(3,072)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	(9,995)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	(8,058)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Wind
Segment Reporting Information [Line Items]
Revenues	15,131us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	13,545us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	30,244us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	42,937us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember
Wind | Operating Segments
Segment Reporting Information [Line Items]
Operating profit (loss)	1,301us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	1,067us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	(16,790)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember	(3,207)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_WindMember
Grid
Segment Reporting Information [Line Items]
Revenues	6,119us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	7,018us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	15,157us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	24,893us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember
Grid | Operating Segments
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (7,050)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	$ (4,670)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	$ (20,016)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember	$ (15,287)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = amsc_GridMember

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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X

- Details

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X

- Details

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