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Note 4 - Income Taxes | 6 Months Ended
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Mar. 31, 2022
Notes to Financial Statements |
Income Tax Disclosure [Text Block] |
4. | Income Taxes
The effective tax rate for the three month and six month periods ended March 31, 2022 reflected in the table below are higher than the corresponding periods in fiscal 2021 and the combined federal and state statutory rate of 25.74%. The increase in the effective tax rate corresponds to the recognition of a deferred tax asset associated with the impairment of the Company's investment in the LLC. Excluding the effect of the impairment, the effective tax rate for the three and six month periods ended March 31, 2022 would have been 24.0% and 23.7%, respectively, reflecting the impact of additional tax deductions from the amortization of R&D tax credits deferred as a regulatory liability and the exercise of stock options. The recognition of the impairment resulted in a net loss position for both periods thereby generating a higher effective tax rate as compared to the effective tax rate on the income positions from the corresponding periods in fiscal 2021.
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Effective tax rate |  |  | 26.1 | % |  |  | 25.2 | % |  |  | 26.6 | % |  |  | 24.8 | %
Effective tax rate - LLC impairment |  |  | 25.7 | % |  |  | - |  |  |  | 25.7 | % |  |  | - |
Effective tax rate excluding LLC impairment |  |  | 24.0 | % |  |  | 25.2 | % |  |  | 23.7 | % |  |  | 24.8 | %

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 21 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 270 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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