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Major Customers (Details Textual)	3 Months Ended		6 Months Ended
	Jul. 31, 2012 Customers	Jul. 31, 2011 Customers	Jul. 31, 2012 Customers	Jul. 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	62.00%	42.00%	56.00%	29.00%
Major Customer Two [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major customers	12.00%	32.00%	11.00%	21.00%
Major Customer Three [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major customers	5.00%	19.00%	11.00%	36.00%

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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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