Inventory (Tables)

3 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule Of Inventory Current [Table Text Block]

	December 31,		September 30,
	2017		2017
Raw materials	$	3,382	$	4,104
Work in process		4,429		3,731
Finished goods		1,530		1,692
Parts and supplies		7,665		7,396
Total inventories	$	17,006	$	16,923