XML 25 R29.htm IDEA: XBRL DOCUMENT v2.4.0.6

Business Segments (Tables)

9 Months Ended

Dec. 31, 2011

Business Segments [Abstract]

Schedule Of Business Segments Operating Results

		Three months ended						Nine months ended
		December 31,						December 31,
		2011	2010			2011				2010
Revenues:
Wind	$	10,125		$	10,840		$	27,836	$	183,162
Grid		7,933			20,730			20,080		43,691
Total	$	18,058		$	31,570		$	47,916	$	226,853

								Nine months ended
		Three months ended						December 31,
		December 31,
		2011			2010			2011			2010
Operating (loss) income:
Wind	($	14,014	)	($	12,494	)	($	54,719	)	$	51,499
Grid		(6,313	)		(8,189	)		(24,511	)		(35,166	)
Unallocated corporate		(6,242	)		(2,277	)		(36,790	)		(10,135	)
expenses
Total	($	26,569	)	($	22,960	)	($	116,020	)	$	6,198

Schedule Of Business Segments Assets

		December 31,		March 31,
		2011		2011
Wind	$	89,370	$	145,464
Grid		70,285		67,081
Corporate assets		115,708		228,664
Total	$	275,363	$	441,209

Schedule Of Customers Who Represented 10% Or More Of The Company's Total Revenues

		Three months ended						Nine months ended
		December 31,						December 31,
		2011			2010			2011			2010
Inox Wind, Ltd.		27	%	<	10	%		21	%	<	10	%
Doosan Heavy Industries & Construction Co Ltd.		12	%	<	10	%		15	%	<	10	%
Ergon Energy Corporation Limited		11	%		—		<	10	%		—
Vestas – Australian Wind Technology Ltd	<	10	%		44	%	<	10	%	<	10	%
Hyundai Heavy Industries Co., Ltd.	<	10	%		10	%	<	10	%	<	10	%
Shenyang Blower Works Group Co., Ltd.	<	10	%		11	%	<	10	%	<	10	%
Sinovel Wind Co., Ltd		—			—			—			66	%

X

- Details

Name:	amsc_BusinessSegmentsAbstract
Namespace Prefix:	amsc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule Of Business Segment Assets [Text Block]

+ References

No definition available.

+ Details

Name:	amsc_ScheduleOfBusinessSegmentAssetsTextBlock
Namespace Prefix:	amsc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule Of Business Segment Operating Results [Text Block]

+ References

No definition available.

+ Details

Name:	amsc_ScheduleOfBusinessSegmentOperatingResultsTextBlock
Namespace Prefix:	amsc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 39

+ Details

Name:	us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration