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Note 7 - Inventories (Tables)
12 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

 
  

2021

  

2020

 

Raw materials

 $5,449  $5,220 

Finished goods

  842   841 

Work in process

  877   456 

Inventories, gross

  7,168   6,517 

Reserve for obsolescence

  (752)  (568)

Inventories, net

 $6,416  $5,949