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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Estimated fair values of Tellutax contingent consideration (Details) - Tellutax $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2021 payment | Jun. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
Fair Value Measurement Inputs and Valuation Techniques |  |  |  |  |  |
Contingent consideration |  |  |  |  | $ 0 | $ 0
Number of potential earnout payments | payment | 3 |  |  |  |  |
Revenue achievement period | 30 months |  |  |  |  |
Final payment included in other operating expense (income) |  | $ 200 |  |  |  |
Change in fair value of contingent consideration liabilities |  |  | $ 100 | $ (2,275) |  |

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