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SUPPLEMENTAL BALANCE SHEET INFORMATION - Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Sep. 30, 2022
Inventories    
Raw materials $ 2,094 $ 1,757
Work in progress 126 186
Finished goods 4,805 4,933
Research Model Inventory 50,481 68,055
Total 57,506 74,931
Less: Obsolescence reserve (3,586) (3,490)
Inventories, net $ 53,920 $ 71,441