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Warranty: (Tables)
12 Months Ended
Sep. 30, 2012
Warranty:  
Schedule of warranty cost and accrual information

 

 

 
  2012   2011  

Warranty Accrual as of October 1,

  $ 955,549   $ 933,270  

Accrued expense for fiscal year

    89,815     244,408  

Warranty cost incurred for fiscal year

    (194,865 )   (222,129 )
           

Warranty accrual as of September 30,

  $ 850,499   $ 955,549