Major Customers (Details)	12 Months Ended
	Jan. 31, 2013 Customers	Jan. 31, 2012 Customers
Major Customers (Textual) [Abstract]
Number of major power industry service customers	2	3
Power Industry Services [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted for by major segment	94.00%	93.00%
Major Customer One [Member] | Power Industry Services [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted by major customers	56.00%	43.00%
Major Customer Two [Member] | Power Industry Services [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted by major customers	18.00%	30.00%
Major Customer Three [Member] | Power Industry Services [Member]
Major Customers (Textual) [Abstract]
Percentage of consolidated net revenue accounted by major customers		12.00%