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Note 8 - Property and Equipment, Net (Tables)
9 Months Ended
Jun. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   

June 30,

   

September 30,

 
   

2021

   

2020

 

Office furniture and equipment

  $ 1,241     $ 1,181  

Machinery and equipment

    1,248       1,184  

Leasehold improvements

    2,155       2,056  

Construction in progress

    29       8  

Property and equipment, gross

    4,673       4,429  

Accumulated depreciation

    (2,837 )     (2,499 )

Property and equipment, net

  $ 1,836     $ 1,930