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Note 6 - Inventories, Net (Tables)
3 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

December 31,

  

September 30,

 
  

2021

  

2021

 

Raw materials

 $8,401  $5,449 

Finished goods

  893   842 

Work in process

  552   877 

Inventories, gross

  9,846   7,168 

Reserve for obsolescence

  (704)  (752)

Inventories, net

 $9,142  $6,416