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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 | 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 |

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