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Income Taxes - Valuation Allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Mar. 31, 2022
Mar. 31, 2021
Valuation Allowance [Roll Forward]      
Beginning balance   $ 30,537 $ 0
Income tax decrease   (27,413)  
Equity decrease $ (5,000) (5,006)  
Equity increase   15,304 30,537
Ending balance   $ 13,422 $ 30,537