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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Activity of Liabilities Measured at Fair Value on a Recurring Basis (Details) - Level 3 - Fair Value, Recurring $ in Thousands | 12 Months Ended
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Mar. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | $ 5,016
Change in fair value of preferred stock warrants | 664
Settlements | (797)
Ending balance | 0
Convertible Promissory Notes - 2019 and 2020 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Settlements | $ (4,883)

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