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Commitments And Contingencies (Details)	1 Months Ended		3 Months Ended	9 Months Ended			0 Months Ended
	Jun. 17, 2011	May 12, 2011	Dec. 31, 2011 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 Chinese Yen Line Of Credit [Member] EUR (€)	Dec. 31, 2011 Euro Line Of Credit [Member] USD ($)	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Dec. 22, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Oct. 17, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Oct. 17, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Oct. 08, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Oct. 08, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Sep. 13, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Sep. 13, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Mar. 31, 2011 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Mar. 31, 2011 Sinovel Wind Group Co. Ltd. [Member] CNY	Sep. 16, 2011 Dalian Guotong Electric Co. Ltd. [Member] USD ($)	Sep. 16, 2011 Dalian Guotong Electric Co. Ltd. [Member] CNY	May 12, 2011 AMSC Windtec [Member] USD ($)	May 12, 2011 AMSC Windtec [Member] EUR (€)
Commitments And Contingencies [Line Items]
Adverse purchase commitments included in purchase commitment			$ 28,800,000	$ 28,800,000
Adverse purchase commitment recoveries (losses)			100,000	(100,000)
Number of putative securities complaints	4	7
Number of officers putative securities filed against		2
Claim amount per request for arbitration							190,000,000	1,200,000,000					157,000,000	1,000,000,000	58,000,000	370,000,000							24,000,000	18,000,000
Monetary damages due to breaches of contracts																			67,000,000	430,000,000
Value of the undelivered components																			720,000,000	4,600,000,000
Net amount of damages claimed									67,000,000	430,000,000	120,000,000	770,000,000
Damages claimed for unauthorized use of software																	6,000,000	38,000,000			200,000	1,200,000
Monetary damages for trade secret infringement																	453,000,000	2,900,000,000
Counterclaim under License Agreement																							9,000,000	6,000,000
Number of outstanding performance bonds				2
Total value of outstanding performance bonds				400,000
Performance bond latest expiration date				October 2012
Restricted cash included in current assets			9,000,000	9,000,000
Restricted cash included in long-term assets			2,540,000	2,540,000
Unused, unsecured lines of credit					2,300,000	3,000,000
Net borrowings on lines of credit outstanding			0	0
Lines of credit facility repaid				$ 4,600,000

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