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Note 7 - Property and Equipment (Tables)
6 Months Ended
Mar. 31, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
March 31,
   
September 30,
 
   
2020
   
2019
 
Office furniture and equipment
  $
1,554,306
    $
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
   
4,826,823
     
4,749,480
 
Accumulated depreciation
   
(2,721,190
)    
(2,479,974
)
Property and equipment, net
  $
2,105,633
    $
2,269,506