Inventory (Tables)

9 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following components:

	June 30,		September 30,
	2019		2018
Raw materials	$	4,447	$	4,453
Work in process		6,171		5,168
Finished goods		1,726		1,746
Parts and supplies		12,006		9,599
Total inventories	$	24,350	$	20,966