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Inventory
9 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
11. INVENTORY

     
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