PURCHASED INTANGIBLE ASSETS - Intangible Assets Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Activity related to intangible assets, excluding goodwill
Intangible assets, beginning of the year	$ 3,824	$ 3,824
Intangible assets, end of the year	11,854	3,824	$ 3,824
Accumulated amortization, beginning of year	1,979	1,736
Amortization of intangibles	531	243	243
Accumulated amortization, end of year	2,510	1,979	$ 1,736
Intangible assets, net	9,344	$ 1,845
APC
Activity related to intangible assets, excluding goodwill
Addition	543
Roberts
Activity related to intangible assets, excluding goodwill
Addition	$ 7,487