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FAIR VALUE MEASUREMENTS - Key Assumptions Used for Valuation (Details) - USD ($) | Mar. 31, 2021 | Mar. 31, 2020
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Volatility |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.650 | 0.750
Risk-free interest rate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.001 | 0.003
Expected term (in years) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 1.2 | 2.3
Dividend yield |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0 | 0
Discount for lack of marketability |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.068 | 0.400

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