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THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2005 | Dec. 31, 2004 | Mar. 31, 2023 USD ($) segment reportingUnit | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Capitalized contract cost, amortization period |  |  | 5 years |  |
Advertising expense |  |  | $ 1,500 | $ 3,400 | $ 9,000
Number of reporting units | reportingUnit |  |  | 1 |  |
Number of reportable segments | segment |  |  | 1 |  |
Accumulated deficit |  |  | $ (792,917) | (766,438) |
Additional paid-in capital |  |  | $ (905,635) | (956,599) |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Accumulated deficit |  |  |  | 46,700 |
Additional paid-in capital |  |  |  | 92,800 |
Senior notes |  |  |  | $ 46,200 |
Equipment |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Property, plant and equipment, useful life |  |  | 3 years |  |
Software and Software Development Costs |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Property, plant and equipment, useful life |  |  | 3 years |  |
Furniture and fixtures |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Property, plant and equipment, useful life |  |  | 5 years |  |
Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Term of contract |  |  | 1 year |  |
Renewal term |  |  | 12 months |  |
Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Term of contract |  |  | 8 years |  |
Renewal term |  |  | 5 years |  |
Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche One |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  | 33.33% |  |
Vesting period |  |  | 1 year |  |
Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Two |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  | 2 years |  |
Quarterly vesting percentage |  |  | 12.50% |  |
Employee Stock | Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Duration of purchase period | 6 months |  |  |  |
Duration of offering period | 1 year | 2 years |  |  |
Convertible Debt | Convertible Senior Notes Due 2024 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Debt instrument, interest rate |  |  | 0.50% |  |
Convertible Debt | Convertible Senior Notes Due 2028 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Debt instrument, interest rate |  |  | 4.00% |  |
Computer Software, Intangible Asset | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 3 years |  |
Computer Software, Intangible Asset | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 4 years |  |

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