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INCOME TAXES - Textuals (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018 | Jan. 31, 2017
Income Taxes [Line Items] |  |  |  |
GILTI net tax impact | $ 100 |  |  |
Deferred tax liabilities related to intangible assets | 13,602 | $ 21,742 |  |
Deferred tax liability tax benefit | 6,100 |  |  |
Undistributed earnings of foreign subsidiaries | $ 85,000 |  |  |
Tax Cuts And Jobs Act Of 2017 Measurement Period Adjustment Increase Decrease In Effective Tax Rate | (3.9) | (18.7) |  |
Corporate income tax rate | 21.00% | 21.00% | 33.80% | 35.00%
Valuation allowance of deferred tax assets | $ 1,900 |  |  |
Decrease in unrecognized tax position reserve for current year accrual of interest and penalties | 2,100 |  |  |
SWITZERLAND |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax liabilities related to intangible assets | $ 7,900 | $ 15,100 |  |

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