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FAIR VALUE MEASUREMENTS - Cash, Cash Equivalents and Investments with Hierarchy (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | $ 111,400 | $ 91,205 | $ 112,531
Accumulated gross unrealized gain, before tax | 59 | 0 |
Accumulated gross unrealized loss, before tax | (28) | (204) |
Cash, cash equivalents and debt securities available-for-sale, amortized cost | 138,926 | 148,434 |
Cash, cash equivalents and debt securities available-for-sale | 138,957 | 148,230 |
Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Accumulated gross unrealized gain, before tax | 4 | 0 |
Accumulated gross unrealized loss, before tax | (1) | (7) |
Cash, cash equivalents and debt securities available-for-sale, amortized cost | 106,362 | 87,533 |
Cash, cash equivalents and debt securities available-for-sale | 106,365 | 87,526 |
Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 32,564 | 60,901 |
Accumulated gross unrealized gain, before tax | 55 | 0 |
Accumulated gross unrealized loss, before tax | (27) | (197) |
Debt securities, available-for-sale | 32,592 | 60,704 |
Cash |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 95,828 | 70,095 |
Cash and cash equivalents, fair value disclosure | 95,828 | 70,095 |
Money market funds | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 8,935 | 12,865 |
Cash and cash equivalents, fair value disclosure | 8,935 | 12,865 |
Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 1,599 | 4,573 |
Accumulated gross unrealized gain, before tax | 4 |  |
Accumulated gross unrealized loss, before tax | (1) | (7) |
Debt securities, available-for-sale | 1,602 | 4,566 |
Certificates of deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 1,329 | 9,509 |
Cash and cash equivalents, fair value disclosure | 1,329 | 9,509 |
Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 8,610 | 23,950 |
Accumulated gross unrealized gain, before tax | 0 | 0 |
Accumulated gross unrealized loss, before tax | (2) | (34) |
Debt securities, available-for-sale | 8,608 | 23,916 |
Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Amortized Costs | 22,625 | 27,442 |
Accumulated gross unrealized gain, before tax | 55 | 0 |
Accumulated gross unrealized loss, before tax | (25) | (163) |
Debt securities, available-for-sale | 22,655 | 27,279 |
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 | 111,400 | 91,205 |
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 | 104,763 | 82,960 |
Cash and Cash Equivalents | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 6,637 | 8,245 |
Cash and Cash Equivalents | Cash |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 95,828 | 70,095 |
Cash and Cash Equivalents | Money market funds | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 8,935 | 12,865 |
Cash and Cash Equivalents | Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Cash and Cash Equivalents | Certificates of deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Cash and Cash Equivalents | Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 6,637 | 7,445 |
Cash and Cash Equivalents | Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 800 |
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 | 1,329 | 9,509 |
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 | 0 | 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 | 1,329 | 9,509 |
Restricted Cash (Current & Non-current) | Cash |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Restricted Cash (Current & Non-current) | Money market funds | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 0 | 0 |
Restricted Cash (Current & Non-current) | Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Restricted Cash (Current & Non-current) | Certificates of deposit | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cash and cash equivalents | 1,329 | 9,509 |
Restricted Cash (Current & Non-current) | Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Restricted Cash (Current & Non-current) | Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Short-Term Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 44,845 |
Cash, cash equivalents and debt securities available-for-sale | 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 | 1,602 | 4,566 |
Short-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 24,626 | 40,279 |
Short-Term Investments | Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 1,602 | 4,566 |
Short-Term Investments | Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 1,971 | 16,471 |
Short-Term Investments | Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 22,655 | 23,808 |
Long-Term Investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale |  | 2,671 |
Cash, cash equivalents and debt securities available-for-sale | 0 |  |
Long-Term Investments | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Long-Term Investments | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 2,671 |
Long-Term Investments | Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Long-Term Investments | Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | 0 | 0 |
Long-Term Investments | Corporate debt | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities, available-for-sale | $ 0 | $ 2,671 |

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