DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION (Details)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
GPS
Description of the Business
Consolidated revenues by subsidiaries	53.00%	88.00%	85.00%
Power Services | Minimum
Description of the Business
Revenue Recognition Period	3 months
Power Services | Maximum
Description of the Business
Revenue Recognition Period	3 years