Inventory (Tables)

6 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following components:

	March 31,		September 30,
	2020		2019
Raw materials	$	3,662	$	4,104
Work in process		5,704		6,301
Finished goods		1,384		1,861
Parts and supplies		11,538		9,277
Total inventories	$	22,288	$	21,543