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Inventory
12 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
16. INVENTORY
     
Inventories consist of the following components:
 
September 30,
 
2019
 
2018
Raw materials
$
4,104

 
$
4,453

Work in process
6,301

 
5,168

Finished goods
1,861

 
1,746

Parts and supplies
9,277

 
9,599

Total inventories
$
21,543

 
$
20,966