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Schedule II - Valuation and Qualifying Accounts (Tables)
3 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule Of Valuation and Qualifying Accounts [Table Text Block]
           
Additions
                 
Description
 
Balance at
Beginning
of Period
   
Charged to
Costs and
Expenses
   
Charged
to Other
Accounts
   
Deductions
   
Balance at
End of Period
 
Deducted from Asset Accounts:                                        
Year Ended September 30, 2015
 
Reserve for doubtful accounts
  $
10,000
    $
(3,255
(1)
  $
-
 (2)
 
  $
(3,255
(3)
  $
10,000
 
Reserve for inventory obsolescence
  $
363,500
    $
(47,045
(5)
  $
-
 
  $
64,955
  (4)
 
  $
251,500
 
Reserve for product warranty
  $
9
    $
12,555
 
  $
-
 
  $
12,564
 
  $
-
 
Valuation allowance for deferred taxes
  $
4,166,700
    $
82,200
 
  $
-
 
  $
-
 
  $
4,248,900
 
Year Ended September 30, 2016
 
Reserve for doubtful accounts
  $
10,000
    $
(1,784
(1)
  $
-
 (2)
 
  $
(1,784
(3)
  $
10,000
 
Reserve for inventory obsolescence
  $
251,500
    $
82,292
  (5)
 
  $
-
 
  $
(98,200
(4)
  $
235,592
 
Reserve for product warranty
  $
-
    $
8,912
 
  $
-
 
  $
8,912
 
  $
-
 
Valuation allowance for deferred taxes
  $
4,248,900
    $
(3,681,100
)
  $
67,800
 (6)
 
  $
-
 
  $
500,000
 
Year Ended September 30, 2017
 
Reserve for doubtful accounts
  $
10,000
    $
275
  (1)
 
  $
 
 (2)
 
  $
-
  (3)
 
  $
10,275
 
Reserve for inventory obsolescence
  $
235,592
    $
284,352
  (5)
 
  $
-
 
  $
(46,692
(4)
  $
473,252
 
Reserve for product warranty
  $
-
    $
 
 
  $
-
 
  $
 
 
  $
0
 
Valuation allowance for deferred taxes
  $
500,000
    $
-
 
  $
-
 
  $
-
 
  $
500,000
 
Three Months Ended December 31, 2017
 
Reserve for doubtful accounts
  $
10,275
    $
-
  (1)
 
  $
 
 (2)
 
  $
-
  (3)
 
  $
10,275
 
Reserve for inventory obsolescence
  $
473,252
    $
56,261
  (5)
 
  $
-
 
  $
(72,008
(4)
  $
457,505
 
Reserve for product warranty
  $
-
    $
-
 
  $
-
 
  $
 
 
  $
0
 
Valuation allowance for deferred taxes
  $
500,000
    $
(452,681
)
  $
-
 
  $
-
 
  $
47,319
 
Reserve for uncertain tax positions
  $
-
    $
395,000
 
  $
-
 
  $
-
 
  $
395,000