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FAIR VALUE MEASUREMENTS - Cash, Cash Equivalents and Investments with Hierarchy (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | $ 144,030 | $ 111,400 | $ 100,512
Accumulated gross unrealized gain, before tax | 0 | 59 |
Accumulated gross unrealized loss, before tax | (1) | (28) |
Cash, cash equivalents and debt securities available-for-sale, amortized cost | 149,758 | 138,926 |
Cash, cash equivalents and debt securities available-for-sale | 149,757 | 138,957 |
Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Accumulated gross unrealized gain, before tax | 0 | 4 |
Accumulated gross unrealized loss, before tax | 0 | (1) |
Cash, cash equivalents and debt securities available-for-sale, amortized cost | 135,398 | 106,362 |
Cash, cash equivalents and debt securities available-for-sale | 135,398 | 106,365 |
Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 14,360 | 32,564 |
Accumulated gross unrealized gain, before tax | 0 | 55 |
Accumulated gross unrealized loss, before tax | (1) | (27) |
Debt securities, available-for-sale | 14,359 | 32,592 |
Cash and Cash Equivalents |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash, cash equivalents and debt securities available-for-sale | 144,030 | 111,400 |
Cash and Cash Equivalents | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash, cash equivalents and debt securities available-for-sale | 133,816 | 104,763 |
Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 10,214 | 6,637 |
Restricted Cash (Current & Non-current) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash, cash equivalents and debt securities available-for-sale | 983 | 1,329 |
Restricted Cash (Current & Non-current) | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash, cash equivalents and debt securities available-for-sale | 983 | 0 |
Restricted Cash (Current & Non-current) | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 1,329 |
Short-Term Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 4,744 | 26,228 |
Short-Term Investments | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 599 | 1,602 |
Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 4,145 | 24,626 |
Cash |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 70,729 | 95,828 |
Cash and cash equivalents, fair value disclosure | 70,729 | 95,828 |
Cash | Cash and Cash Equivalents |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 70,729 | 95,828 |
Cash | Restricted Cash (Current & Non-current) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Money market funds | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 64,070 | 8,935 |
Cash and cash equivalents, fair value disclosure | 64,070 | 8,935 |
Accumulated gross unrealized gain, before tax | 0 | 0 |
Accumulated gross unrealized loss, before tax | 0 | 0 |
Money market funds | Cash and Cash Equivalents | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 63,087 | 8,935 |
Money market funds | Restricted Cash (Current & Non-current) | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 983 | 0 |
Money market funds | Short-Term Investments | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 599 | 1,599 |
Accumulated gross unrealized gain, before tax | 0 | 4 |
Accumulated gross unrealized loss, before tax | 0 | (1) |
Debt securities, available-for-sale | 599 | 1,602 |
Treasury securities | Cash and Cash Equivalents | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Treasury securities | Restricted Cash (Current & Non-current) | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Treasury securities | Short-Term Investments | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 599 | 1,602 |
Term deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 10,214 |  |
Cash and cash equivalents, fair value disclosure | 10,214 |  |
Accumulated gross unrealized gain, before tax | 0 |  |
Accumulated gross unrealized loss, before tax | 0 |  |
Term deposit | Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 10,214 |  |
Term deposit | Restricted Cash (Current & Non-current) | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 |  |
Term deposit | Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 |  |
Certificate of deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 1,329 |
Cash and cash equivalents, fair value disclosure |  | 1,329 |
Accumulated gross unrealized gain, before tax |  | 0 |
Accumulated gross unrealized loss, before tax |  | 0 |
Certificate of deposit | Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 0 |
Certificate of deposit | Restricted Cash (Current & Non-current) | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents |  | 1,329 |
Certificate of deposit | Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 0 |
Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 4,146 | 8,610 |
Accumulated gross unrealized gain, before tax | 0 | 0 |
Accumulated gross unrealized loss, before tax | (1) | (2) |
Debt securities, available-for-sale | 4,145 | 8,608 |
Commercial paper | Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 6,637 |
Commercial paper | Restricted Cash (Current & Non-current) | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 0 |
Commercial paper | Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | $ 4,145 | 1,971 |
Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs |  | 22,625 |
Accumulated gross unrealized gain, before tax |  | 55 |
Accumulated gross unrealized loss, before tax |  | (25) |
Debt securities, available-for-sale |  | 22,655 |
Corporate debt | Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 0 |
Corporate debt | Restricted Cash (Current & Non-current) | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 0 |
Corporate debt | Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | $ 22,655 |

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