PROPERTY AND EQUIPMENT (Detail Textuals) - USD ($)	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Property Plant And Equipment [Abstract]
Fixed asset write offs	$ 618,000	$ 1,100,000
Depreciation expense	$ 23,000,000	$ 17,900,000	$ 11,400,000