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Note 8 - Property and Equipment
9 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
8
. PROPERTY AND EQUIPMENT
 
Property and equipment consisted of the following:
 
   
June 30,
2018
   
September 30,
2017
 
Office furniture and equipment
  $
1,103,861
    $
1,093,502
 
Machinery and equipment
   
1,167,712
     
994,157
 
Leasehold improvements
   
76,138
     
76,138
 
Property and equipment, gross
   
2,347,711
     
2,163,797
 
Accumulated depreciation
   
(1,850,228
)    
(1,654,194
)
Property and equipment, net
  $
497,483
    $
509,603
 
 
   
Nine months ended
 
   
June 30,
 
   
2018
   
2017
 
Depreciation expense
  $
184,174
    $
88,257