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Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Mar. 31, 2011

Schedule II - Valuation And Qualifying Accounts [Abstract]

Schedule II - Valuation And Qualifying Accounts

American Superconductor Corporation Schedule II—Valuation and Qualifying Accounts (In thousands)

		Balance,				Recoveries and			Balance,
		Beginning of				Other			End of
		Year	Additions	Write-offs		Adjustments			Year
Allowance for doubtful accounts receivable:
Fiscal year ended March 31, 2011	$	766	28	(118	)	7		$	683
Fiscal year ended March 31, 2010		1,343	286	(54	)	(809	)		766
Fiscal year ended March 31, 2009		5	1,652	(203	)	(111	)		1,343

		Balance,						Balance,
		Beginning of						End of
		Year	Additions	Expirations		Adjustments		Year
Deferred tax asset valuation allowance:
Fiscal year ended March 31, 2011	$	187,358	43,308	(10,063	)	(7	)	220,596
Fiscal year ended March 31, 2010		174,695	16,189	(4,148	)	622		187,358
Fiscal year ended March 31, 2009		171,664	7,055	—		(4,024	)	174,695

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- Definition

An element designated to encapsulate the entire schedule of any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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