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Note 7 - Accrued Liabilities and Other Liabilities - Noncurrent (Tables)
9 Months Ended
Jun. 30, 2016
Warranty Reserves [Member]  
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
 
 
June 30,
 
 
September 30,
 
 
June 30,
 
 
September 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
Short-term warranty reserve
  $ 261,328     $ 289,660     $ 261,328     $ 289,660  
Long-term warranty reserve
    52,951       25,958       52,951       25,958  
Total warranty reserve
  $ 314,279     $ 315,618     $ 314,279     $ 315,618  
Schedule of Accrued Liabilities [Table Text Block]
 
 
June 30,
 
 
September 30,
 
 
 
2016
 
 
2015
 
                 
Payroll and related
  $ 1,200,915     $ 330,916  
Deferred revenue
    339,095       51,345  
Warranty reserve
    261,328       289,660  
Accrued contract costs
    98,517       197,034  
Other
    -       1,600  
Total
  $ 1,899,855     $ 870,555  
                 
                 
Other liabilities - noncurrent consisted of the following:
               
                 
Deferred rent
  $ 104,119     $ 121,996  
Extended warranty
    52,951       25,958  
Total
  $ 157,070     $ 147,954  
Schedule of Product Warranty Liability [Table Text Block]
 
 
Three month ended
 
 
Nine months ended
 
 
 
June 30,
 
 
June 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
Beginning balance
  $ 317,822     $ 327,236     $ 315,618     $ 314,311  
Warranty provision
    4,307       (20,954 )     30,610       19,720  
Warranty settlements
    (7,850 )     (5,511 )     (31,949 )     (33,260 )
Ending balance
  $ 314,279     $ 300,771     $ 314,279     $ 300,771