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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, 2016 | Jan. 31, 2016
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Assets: |  |
Net operating loss ("NOL") carryforwards | $ 3,103 | $ 3,345
Stock options | 2,323 | 2,354
Purchased intangibles | 1,763 | 1,905
Accrued expenses | 2,310 | 2,144
Other | 1,049 | 328
Total Assets | 10,548 | 10,076
Liabilities: |  |
Construction contracts | (3,282) | (3,681)
Purchased intangibles | (4,421) | (4,375)
Property and equipment and other | (2,410) | (2,244)
Total Liabilities | (10,113) | (10,300)
Net deferred tax assets | $ 435 |
Net deferred tax liabilities |  | $ (224)

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