Inventory (Tables)

6 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule Of Inventory Current [Table Text Block]

	March 31,		September 30,
	2018		2017
Raw materials	$	3,414	$	4,104
Work in process		4,197		3,731
Finished goods		1,605		1,692
Parts and supplies		8,374		7,396
Total inventories	$	17,590	$	16,923