DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION (Details)	3 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Power Services | Minimum
Description of the Business
Revenue recognition period	1 month
Power Services | Maximum
Description of the Business
Revenue recognition period	3 years
GPS
Description of the Business
Consolidated revenues by subsidiaries	90.00%	79.00%