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STOCKHOLDERS' EQUITY: - Stock-based Compensation Expense Related to Discontinued Operations (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) numberOfExerciseMultiple | Mar. 31, 2020 USD ($) numberOfExerciseMultiple | Mar. 31, 2019 USD ($) | Feb. 17, 2021 numberOfExerciseMultiple | Jul. 02, 2019 numberOfExerciseMultiple
Share-based compensation |  |  |  |  |
Stock-based compensation of discontinued operations |  |  | $ 62.9 |  |
Consideration Holdback |  |  |  |  |
Share-based compensation |  |  |  |  |
Contingent consideration arrangements, number of annual increments | numberOfExerciseMultiple |  | 3 |  |  |
DataFleets, Ltd |  |  |  |  |
Share-based compensation |  |  |  |  |
Holdback consideration transferred | $ 18.1 |  |  |  |
Holdback expenses | 0.8 |  |  |  |
DataFleets, Ltd | Accrued Liabilities |  |  |  |  |
Share-based compensation |  |  |  |  |
Holdback expenses | $ 0.8 |  |  |  |
DataFleets, Ltd | Consideration Holdback |  |  |  |  |
Share-based compensation |  |  |  |  |
Contingent consideration arrangements, number of annual increments | numberOfExerciseMultiple | 3 |  |  | 3 |
Data Plus Math Corporation |  |  |  |  |
Share-based compensation |  |  |  |  |
Holdback consideration transferred |  | $ 24.4 |  |  |
Holdback expenses |  | 14.2 |  |  |
Data Plus Math Corporation | Accrued Liabilities |  |  |  |  |
Share-based compensation |  |  |  |  |
Holdback expenses |  | $ 6.1 |  |  |
Data Plus Math Corporation | Consideration Holdback |  |  |  |  |
Share-based compensation |  |  |  |  |
Contingent consideration arrangements, number of annual increments | numberOfExerciseMultiple |  |  |  |  | 3

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