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Note 7 - Property and Equipment (Tables)
9 Months Ended
Jun. 30, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
June 30,
   
September 30,
 
   
2020
   
2019
 
Office furniture and equipment
  $
1,568,585
    $
1,498,395
 
Machinery and equipment
   
1,237,617
     
1,223,726
 
Leasehold improvements
   
2,027,335
     
2,019,794
 
Construction in progress
   
7,565
     
7,565
 
Property and equipment, gross
   
4,841,102
     
4,749,480
 
Accumulated depreciation
   
(2,856,435
)    
(2,479,974
)
Property and equipment, net
  $
1,984,667
    $
2,269,506