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Note 10 - Accrued and Other Liabilities (Tables)
12 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
September 30,
 
   
2018
   
2017
 
Payroll and related
  $
2,041,735
    $
1,870,579
 
Deferred revenue
   
659,682
     
343,163
 
Accrued contract costs
   
197,034
     
197,034
 
Severance
   
152,730
     
-
 
Warranty reserve
   
99,216
     
104,518
 
Deferred rent
   
49,467
     
46,101
 
Total
  $
3,199,864
    $
2,561,395
 
Other Noncurrent Liabilities [Table Text Block]
   
September 30,
 
   
2018
   
2017
 
Deferred rent
  $
1,663,058
     
-
 
Deferred extended warranty revenue
   
76,372
     
-
 
Total
  $
1,739,430
    $
-
 
Schedule of Product Warranty Liability [Table Text Block]
   
September 30,
 
   
2018
   
2017
 
Beginning balance
  $
104,518
    $
243,423
 
Warranty provision
   
6,093
     
(70,946
)
Warranty settlements
   
(11,395
)    
(67,959
)
Ending balance
  $
99,216
    $
104,518