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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Sep. 30, 2019
Inventories    
Raw Materials $ 23,008 $ 17,935
Work-in-process 125,178 138,859
Finished Goods 114,194 100,590
Other 1,505 1,418
Total $ 263,885 $ 258,802