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Note 7 - Accrued Liabilities and Other Liabilities - Noncurrent (Tables)
9 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
 
 
June 30,
 
 
September 30,
 
 
 
2017
 
 
2016
 
                 
Payroll and related
  $
1,167,742
    $
382,845
 
Warranty reserve
   
400,179
     
285,402
 
Accrued contract costs
   
255,460
     
197,034
 
Deferred revenue
   
65,990
     
637,763
 
Customer deposits
   
8,968
     
-
 
Total
  $
1,898,339
    $
1,503,044
 
                 
Other liabilities - noncurrent consisted of the following:
               
                 
Deferred rent
  $
61,468
    $
93,456
 
Extended warranty
   
-
     
71,582
 
Total
  $
61,468
    $
165,038
 
Schedule of Product Warranty Liability [Table Text Block]
 
 
Three month ended
 
 
Nine months ended
 
 
 
June 30,
 
 
June 30,
 
 
 
2017
 
 
2016
 
 
2017
 
 
2016
 
Beginning balance
  $
449,141
    $
317,822
    $
356,984
    $
315,618
 
Warranty provision
   
(2,761
)    
4,307
     
108,608
     
30,610
 
Warranty settlements
   
(46,201
)    
(7,850
)    
(65,413
)    
(31,949
)
Ending balance
  $
400,179
    $
314,279
    $
400,179
    $
314,279