INCOME TAXES - Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Assets:
Net operating loss carryforwards	$ 2,635	$ 3,487
Stock options	2,042	1,594
Purchased intangibles	864	1,592
Accrued expenses and other	862	2,052
Total Assets	6,403	8,725
Liabilities:
Purchased intangibles	(3,664)	(4,428)
Construction contracts	(1,896)	(2,862)
Property and equipment and other	(1,683)	(2,389)
Total Liabilities	(7,243)	(9,679)
Net deferred tax liabilities	(840)	$ (954)
Net operating losses	7,500
Republic of Ireland
Liabilities:
Net operating losses	$ 4,300