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STOCK-BASED COMPENSATION: - Acquisition-related Consideration Holdback (Details) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
DataFleets, Ltd |  |
Share-based compensation |  |
Holdback expenses | $ 2.3 |
Holdback expenses, expected costs | 6.0 |
DataFleets, Ltd | Accrued Liabilities |  |
Share-based compensation |  |
Holdback expenses | 2.3 |
Data Plus Math Corporation |  |
Share-based compensation |  |
Holdback expenses |  | $ 16.2
Holdback expenses, expected costs | $ 8.1 |
Data Plus Math Corporation | Accrued Liabilities |  |
Share-based compensation |  |
Holdback expenses |  | $ 0.0

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