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SUPPLEMENTAL BALANCE SHEET INFORMATION - Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Sep. 30, 2022
Inventories    
Raw materials $ 2,106 $ 1,757
Work in progress 131 186
Finished goods 4,947 4,933
Research Model Inventory 60,617 68,055
Total 67,801 74,931
Less: Obsolescence reserve (3,515) (3,490)
Inventories, net $ 64,286 $ 71,441