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STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share-Based Compensation Expense [Line Items] |  |  |  |
Total stock-based compensation expense | $ 10.7 | $ 14.5 | $ 20.2 | $ 26.5
Cost of revenue |  |  |  |
Share-Based Compensation Expense [Line Items] |  |  |  |
Total stock-based compensation expense | 0.3 | 0.4 | 0.6 | 0.7
Research and development expense |  |  |  |
Share-Based Compensation Expense [Line Items] |  |  |  |
Total stock-based compensation expense | 2.0 | 1.6 | 4.1 | 2.8
Sales and marketing expense |  |  |  |
Share-Based Compensation Expense [Line Items] |  |  |  |
Total stock-based compensation expense | 2.0 | 2.6 | 3.5 | 4.5
General and administrative expense |  |  |  |
Share-Based Compensation Expense [Line Items] |  |  |  |
Total stock-based compensation expense | $ 6.4 | $ 9.9 | $ 12.0 | $ 18.5

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