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Selected Account Information - Components of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Sep. 30, 2021
Selected Account Information [Abstract]    
Prepaid insurance $ 2,562 $ 277
Prepaid legal 77 112
Prepaid taxes and licenses 581 380
Prepaid rent 387 309
Other 868 850
Total prepaid expenses and other current assets $ 4,475 $ 1,928