INCOME TAXES - Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Assets:
Net operating loss carryforwards	$ 3,034	$ 2,635
Stock awards	2,188	2,042
Research and development credit carryforwards	631
Purchased intangibles	604	864
Accrued expenses and other	758	862
Total Assets	7,215	6,403
Liabilities:
Purchased intangibles	(3,373)	(3,664)
Construction contracts	(454)	(1,896)
Property and equipment and other	(2,131)	(1,683)
Total Liabilities	(5,958)	(7,243)
Net deferred tax assets	1,257
Net deferred tax liabilities		(840)
Net operating losses	9,500
Income tax benefit (expense)	4,651	$ (40,279)	$ (37,106)
Republic of Ireland
Liabilities:
Net operating losses	3,000
Income tax benefit (expense)	$ 400