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Note D - Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Gross long-term deferred tax liability | $ (77) | $ (284,922)
Valuation allowance | (104,858) | (159,154)
Net long-term deferred tax liability | (104,935) | (444,076)
Long-term [Member] |  |
Intangibles | (70,467) | (90,085)
Property and equipment depreciation | (552,119) | (948,653)
Stock-based compensation | 151,558 | 209,645
Goodwill | (583,415) | (866,388)
Short Term [Member] |  |
Net operating loss carry forwards and credits | 464,274 | 551,125
Inventories | 400,111 | 503,632
Prepaid expenses | (60,806) | (48,847)
Accrued expenses and reserves | $ 250,787 | $ 404,649

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