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Accounts Receivable and Concentration of Credit Risk (Tables)
 12 Months Ended
Sep. 30, 2020
Accounts Receivable and Concentration of Credit Risk [Abstract]  
Components of Accounts Receivable



 

 

 

 

 



2020

 

2019



 

 

 

 

 

Trade receivables, gross

$

 5,332,786 

 

$

 5,410,165 

Less: allowance for doubtful accounts

 

 (25,643)

 

 

 (33,143)

Less: allowance for sales returns and payment term discounts

 

 (79,906)

 

 

 (49,623)

Less: long-term trade receivables*

 

 —

 

 

 (306,342)

Accounts receivable, net

$

 5,227,237 

 

$

 5,021,057 



Summary of Components of Allowance for Doubtful Accounts



 

 

 

 

 



2020

 

2019



 

 

 

 

 

Beginning balance

$

 33,143 

 

$

 36,201 

Charges to expense

 

 —

 

 

 —

Charge-offs

 

 (7,500)

 

 

 (3,058)

Ending balance

$

 25,643 

 

$

 33,143