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RESTRUCTURING CHARGES - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Mar. 31, 2025 USD ($) employee | Mar. 31, 2027 USD ($) | Mar. 31, 2026 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges | $ 304 | $ 2,409 | $ 833 | $ 18,972 |  |  |
One-time Termination Benefits |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  | 833 |  |  |  |
One-time Termination Benefits | Q1 FY25 VSP |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | $ 19,600 |  |
Number of employees terminated | employee |  |  |  |  | 142 |  |
Restructuring charges |  |  | 0 |  |  |  |
One-time Termination Benefits | Q3 FY25 Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  | 800 |  | $ 900 |  |
Restructuring charges |  |  | $ 833 |  |  |  |
One-time Termination Benefits | Q3 FY25 Plan | Forecast |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring and related cost, expected cost |  |  |  |  |  | $ 100 | $ 100

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