Note A - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Balance at Beginning of Year | $ 93,473 | $ 79,473 | $ 97,950 |
| Additions Charged to Costs and Expenses | 25,000 | ||
| Less Write-offs | (14,388) | (11,000) | (18,477) |
| Balance at End of Year | $ 79,085 | $ 93,473 | $ 79,473 |
| X | ||||||||||
- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in the allowance for doubtful accounts. No definition available.
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| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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