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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
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)