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Business Segments (Schedule Of Revenues By Major Customers) (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
CG Power Solutions UK Ltd. [Member]
Revenue, Major Customer [Line Items]
Revenue percentage	20.80%		10.00%
E.ON Climate & Renewables [Member]
Revenue, Major Customer [Line Items]
Revenue percentage	19.40%		10.00%
INOX Wind Limited [Member]
Revenue, Major Customer [Line Items]
Revenue percentage	18.90%	26.50%	17.30%	20.50%
Beijing JINGCHENG New Energy Co., Ltd. [Member]
Revenue, Major Customer [Line Items]
Revenue percentage	10.00%	10.00%	16.70%	10.00%
Doosan Heavy Industries & Construction Co Ltd. [Member]
Revenue, Major Customer [Line Items]
Revenue percentage	10.00%	12.10%	10.00%	14.80%
Ergon Energy Corporation Limited [Member]
Revenue, Major Customer [Line Items]
Revenue percentage		10.60%		10.00%

X

- Details

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X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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