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Inventory (Tables)
6 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule Of Inventory Current [Table Text Block]
March 31,September 30,
20192018
Raw materials$4,368$4,453
Work in process5,9725,168
Finished goods2,2181,746
Parts and supplies11,1719,599
Total inventories$23,729$20,966