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INCOME TAXES - Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Jul. 31, 2017
Jan. 31, 2017
Assets:    
Net operating loss ("NOL") carryforwards $ 3,604 $ 3,487
Stock options 2,271 1,594
Purchased intangibles 1,439 1,592
Accrued expenses and other 2,074 2,052
Total Assets 9,388 8,725
Liabilities:    
Purchased intangibles (4,567) (4,428)
Construction contracts (3,228) (2,862)
Property and equipment and other (2,365) (2,389)
Total Liabilities (10,160) (9,679)
Net deferred tax liabilities $ (772) $ (954)