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Inventory (Tables)
3 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule Of Inventory Current [Table Text Block]
December 31,September 30,
20182018
Raw materials$4,385$4,453
Work in process5,9265,168
Finished goods1,8301,746
Parts and supplies11,7409,599
Total inventories$23,881$20,966