Note D - Income Taxes (Tables)
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12 Months Ended |
Sep. 30, 2019 |
| Notes Tables |
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| Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
| | | September 30, | | September 30, | | September 30, | | | | 2019 | | 2018 | | 2017 | | Current: | | | | | | | | | | | | | | Federal | | $ | 1,260,552 | | | $ | 1,472,512 | | | $ | 1,627,125 | | | State | | | 103,130 | | | | 120,034 | | | | 78,552 | | | Current income tax expense | | |
| | | | 1,592,546 | | | | 1,705,677 | | | Deferred: | | | | | | | | | | | | | | Federal | | | (38,534 | ) | | | (463,798 | ) | | | 8,680 | | | State | | | 35,289 | | | | 124,657 | | | | 23,617 | | | Deferred income tax expense | | | (3,245 | ) | | | (339,141 | ) | | | 32,297 | | | Income tax expense | | $ | 1,360,437 | | | $ | 1,253,405 | | | $ | 1,737,974 | |
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| Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
| | | September 30, | | September 30, | | September 30, | | | | 2019 | | 2018 | | 2017 | | Federal statutory rate | | | 21 | % | | | 24 | % | | | 34 | % | | Federal rate change | | | - | | | | (5 | %) | | | - | | | State income taxes | | | 2 | % | | | 2 | % | | | 1 | % | | Permanent differences | | | - | | | | - | | | | (1 | %) | | Change in valuation allowance | | | (1 | %) | | | (3 | %) | | | (4 | %) | | Expiration and utilization of state NOL’s | | | 2 | % | | | 4 | % | | | 3 | % | | Research and development credits | | | (2 | %) | | | (1 | %) | | | (1 | %) | | Excess tax expense (benefits) from stock-based compensation | | | 1 | % | | | 2 | % | | | (1 | %) | | Tax rate | | | 23 | % | | | 23 | % | | | 31 | % |
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| Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
| | | September 30, | | September 30, | | | | 2019 | | 2018 | | Deferred income tax assets (liabilities): | | | | | | | | | | Intangibles | | $ | (75,190 | ) | | $ | (70,467 | ) | | Property and equipment depreciation | | | (521,586 | ) | | | (552,119 | ) | | Net operating loss carry forwards and credits | | | 377,505 | | | | 464,274 | | | Stock-based compensation | | | 114,118 | | | | 151,558 | | | Inventories | | | 350,197 | | | | 400,111 | | | Prepaid expenses | | | (63,252 | ) | | | (60,806 | ) | | Accrued expenses and reserves | | | 371,414 | | | | 250,787 | | | Goodwill | | | (607,882 | ) | | | (583,415 | ) | | Gross deferred tax liability | | | (54,676 | ) | | | (77 | ) | | Valuation allowance | | | (47,014 | ) | | | (104,858 | ) | | Net deferred tax liability | | $ | (101,690 | ) | | $ | (104,935 | ) |
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| Summary of Valuation Allowance [Table Text Block] |
| Year Ended | | Balance at Beginning of Year | | Income Tax Expense (Benefit) | | Reversal for State NOL Expiration and Utilization | | Balance at End of Year | | September 30, 2019 | | $ | 104,858 | | | $ | 10,448 | | | $ | (68,292 | ) | | $ | 47,014 | | | September 30, 2018 | | | 159,154 | | | | 79,377 | | | | (133,673 | ) | | | 104,858 | | | September 30, 2017 | | | 322,404 | | | | (32,154 | ) | | | (131,096 | ) | | | 159,154 | |
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