INCOME TAXES - Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Assets:
Net operating loss ("NOL") carryforwards	$ 3,132	$ 3,345
Stock options	2,426	2,354
Purchased intangibles	1,821	1,905
Accrued expenses	1,509	2,144
Purchased intangibles and other	850	328
Total Assets	9,738	10,076
Liabilities:
Construction contracts	(5,292)	(3,681)
Purchased intangibles	(4,316)	(4,375)
Property and equipment and other	(2,251)	(2,244)
Total Liabilities	(11,859)	(10,300)
Net deferred tax liabilities	$ (2,121)	$ (224)