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Accrued Liabilities (Tables)
 12 Months Ended
Sep. 30, 2023
Accrued Liabilities  
Schedule of principal components of accrued liabilities
               
    September 30,
    2023   2022
Accrued clinical site and patient visits costs   $ 2,006     $ 2,031  
Accrued compensation and benefits     1,360       1,298  
Fixed contract accruals     38       417  
Milestone based contract accruals     1,267       137  
All other accrued liabilities     2,624       2,062  
Total accrued liabilities   $ 7,295     $ 5,945