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DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019 | Feb. 01, 2018
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Description of the Business |  |  |
Retained amounts by project owners | $ 20,000 | $ 15,300 |
Retained earnings | $ 189,306 | $ 247,616 |
Maximum | Impact of the Adoption of ASC Topic 606 |  |  |
Description of the Business |  |  |
Retained earnings |  |  | $ 100

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