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Warranty (Tables)
 12 Months Ended
Sep. 30, 2020
Warranty  
Schedule of warranty cost and accrual information

 

 

 

 

 

 

 

 

 

    

2020

    

2019

Warranty accrual as of October 1,

 

$

606,680

 

$

854,952

Expense (release) accrual for fiscal year

 

 

67,464

 

 

(168,589)

Warranty cost incurred for fiscal year     

 

 

(126,401)

 

 

(79,683)

Warranty accrual as of September 30,

 

$

547,743

 

$

606,680