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STOCK PLANS - Narrative (Details) |  |  |  |  |  |  |  | 12 Months Ended | 13 Months Ended | 23 Months Ended
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Sep. 12, 2024 shares | Sep. 14, 2023 shares | Aug. 24, 2022 shares | Sep. 10, 2020 shares | Nov. 08, 2018 shares | Mar. 01, 2012 USD ($) shares | Sep. 07, 2011 shares | Mar. 31, 2025 USD ($) $ / shares shares | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 09, 2020 | Sep. 13, 2023 | Aug. 23, 2022
Performance Based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Award performance measurement period |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation cost | $ |  |  |  |  |  |  |  | $ 103,700,000 |  |  |  |  |
Unrecognized cost, period for recognition, years |  |  |  |  |  |  |  | 1 year 2 months 12 days |  |  |  |  |
Employee stock |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares purchased by employees (in shares) |  |  |  |  |  |  |  | 516,890 |  |  |  |  |
Shares issued under ESPP plan, weighted average purchase price per share (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 22.07 |  |  |  |  |
Shares available for future issuance under the ESPP (in shares) |  |  |  |  |  |  |  | 1,690,798 |  |  |  |  |
Maximum | Incentive options |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Term of options granted, years |  |  |  |  |  |  |  | 5 years |  |  |  |  |
2011 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional shares available (in shares) |  |  | 2,000,000 |  | 3,000,000 |  | 2,500,000 |  |  |  |  |  |
Maximum payroll deductions for purchase of shares by participants |  |  |  |  |  | 20.00% |  |  |  |  |  |  |
Maximum number of shares available for purchased by participants (in shares) |  |  |  |  |  | 2,000 |  |  |  |  |  |  |
Cap on fair value of shares available for purchase by participants | $ |  |  |  |  |  | $ 25,000 |  |  |  |  |  |  |
Percentage of common stock price for employees |  |  |  |  |  | 85.00% |  |  |  |  |  |  |
2011 Employee Stock Purchase Plan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cap on fair value of shares available for purchase by participants | $ |  |  |  |  |  | $ 50,000 |  |  |  |  |  |  |
2019 Amended, Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional shares available (in shares) | 3,400,000 | 5,900,000 | 7,000,000 | 4,700,000 |  |  |  |  |  |  |  |  |
Minimum vesting requirement |  |  |  | 1 year |  |  |  |  |  |  |  |  |
Common stock, equity awards reserved for issuance (in shares) | 7,947,545 |  |  |  |  |  |  |  |  |  |  |  |
Shares issued in period (in shares) | 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Shares available for grant (in shares) | 4,547,545 |  |  |  |  |  |  | 8,148,385 |  |  |  |  |
Reduction for each share of common stock pursuant to option |  | 1 |  |  |  |  |  |  |  |  |  |  |
Reduction for each share of common stock pursuant to other than option |  | 2.67 |  |  |  |  |  |  |  |  | 2.76 | 2.34 | 2.32
2019 Amended, Equity Incentive Plan | Appreciation Award |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Addition in reserve equity |  | 1 |  |  |  |  |  |  |  |  |  |  |
Percentage of fair market value of common stock |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
2019 Amended, Equity Incentive Plan | Full Value Award |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Addition in reserve equity |  | 2.67 |  |  |  |  |  |  |  |  |  |  |
2019 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum vesting requirement |  |  |  |  |  |  |  | 4 years |  |  |  |  |
Shares available for grant (in shares) |  |  |  |  |  |  |  | 5,745,989 |  |  |  |  |
Percentage of incentive stock option granted |  |  |  |  |  |  |  | 110.00% |  |  |  |  |
2019 Equity Incentive Plan | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Term of options granted, years |  |  |  |  |  |  |  | 7 years |  |  |  |  |
2019 Equity Incentive Plan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of fair market value of common stock |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Percentage of voting stock |  |  |  |  |  |  |  | 10.00% |  |  |  |  |
2007 Equity Incentive Plan | Independent Directors |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of annualized forfeiture rate for awards granted |  |  |  |  |  |  |  | 0.00% | 0.00% | 0.00% |  |  |
2007 Equity Incentive Plan | Senior Executives |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of annualized forfeiture rate for awards granted |  |  |  |  |  |  |  | 2.00% | 2.00% | 2.00% |  |  |
2007 Equity Incentive Plan | Employees |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of annualized forfeiture rate for awards granted |  |  |  |  |  |  |  | 5.00% | 5.00% | 5.00% |  |  |

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- Definition Number of shares issued under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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