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Taxes - Unrecognized tax benfits (Details) - SOFTWARE LUXEMBOURG HOLDING S.A. (SUCCESSOR) AND POINTWELL LIMITED (PREDECESSOR) - USD ($) $ in Thousands | 5 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2021 | Sep. 30, 2020 | Jan. 31, 2020 | Jan. 31, 2019
Unrecognized tax benefits, beginning balances | $ 3,768 | $ 3,773 | $ 2,081 | $ 5,035
Increases for tax positions taken during a prior period | 37 | 35 | 1,987 | 915
Decreases for tax positions taken during a prior period |  | (40) | (295) | (3,736)
Other | 452 |  |  |
Decreases resulting from the expiration of statute of limitations | (339) |  |  | (133)
Unrecognized tax benefits, ending balance | $ 3,918 | $ 3,768 | $ 3,773 | $ 2,081

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