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Major Customers (Details Textual)	3 Months Ended		9 Months Ended
	Oct. 31, 2012 Customers	Oct. 31, 2011 Customers	Oct. 31, 2012 Customers	Oct. 31, 2011 Customers
Major Customers (Textual) [Abstract]
Number of major power industry service customers	3	3	3	3
Major Customer One [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major customers	60.00%	46.00%	57.00%	34.00%
Major Customer Two [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major customers	23.00%	40.00%	15.00%	35.00%
Major Customer Three [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major customers	10.00%	5.00%	7.00%	21.00%

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- Definition

Number of major customers.

+ References

No definition available.

+ Details

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- 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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