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Summary Of Significant Accounting Policies (Allowance for Uncollectible Accounts) (Details)
6 Months Ended
Mar. 31, 2021
USD ($)
Allowance for Uncollectible Accounts [Roll Forward]  
Balance at Beginning of Period $ 22,810
Additions Charged to Costs and Expenses 11,074
Add: Discounts on Purchased Receivables 737
Deduct: Net Accounts Receivable Written-Off 4,493
Balance at End of Period $ 30,128