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Selected Account Information - Components of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Sep. 30, 2022
Selected Account Information [Abstract]    
Prepaid insurance $ 4,960 $ 191
Prepaid legal 32 61
Prepaid taxes and licenses 689 391
Prepaid rent 150 296
Other 1,039 560
Total prepaid expenses and other current assets $ 6,870 $ 1,499