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Commitments And Contingencies (Narrative) (Details)	0 Months Ended		1 Months Ended		12 Months Ended			0 Months Ended										12 Months Ended		0 Months Ended
	May 17, 2013 USD ($)	Jul. 05, 2011 claim	Jun. 17, 2011 claim	May 12, 2011 employee claim	Mar. 31, 2013 USD ($) sqft	Mar. 31, 2012 USD ($)	Mar. 31, 2013 EUR (€)	Feb. 27, 2012 Sinovel Wind Group Co. Ltd. [Member] USD ($)	Feb. 27, 2012 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 Ghodawat Energy Pvt Ltd [Member] USD ($)	May 12, 2011 Ghodawat Energy Pvt Ltd [Member] EUR (€)
Commitments And Contingencies [Line Items]
Adverse purchase commitments					$ 1,440,000	$ 25,894,000
Adjusted accrual for adverse purchase commitments					7,800,000	1,300,000
Total space leased, square feet					316,000,000
Number of putative securities complaints			4	7
Number of officers putative securities filed against				2
Number of complaints additionally asserted claims against the underwriters				1
Loss contingency	1,800,000
Number of claims consolidated		3
Sought compensation amount								17,000,000	105,000,000,000	190,000,000	1,200,000,000	157,000,000	1,000,000,000	58,000,000	370,000,000			76,000,000	485,000,000			24,000,000	18,000,000
Value of the undelivered components																		720,000,000	4,600,000,000
Damages claimed for unauthorized use of software																6,000,000	38,000,000
Monetary damages for trade secret infringement																453,000,000	2,900,000,000
Montary losses from copyright infringement																				200,000	1,200,000
Counterclaims under License Agreement																						9,000,000	6,000,000
Restricted cash included in current assets					6,136,000	12,086,000
Restricted cash					4,820,000	2,540,000
Value of performance bond					200,000
Line of credit outstanding					$ 3,400,000		€ 2,700,000

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