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Income Taxes: | 9 Months Ended
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Sep. 30, 2024
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | Income Taxes Income taxes were accrued at an estimated effective tax rate of (84)% and (26)% for the three and nine months ended September 30, 2024, respectively, as compared to 235% and 70% for the three and nine months ended September 30, 2023, respectively. The effective tax rate for the three and nine months ended September 30, 2024 differs from the federal statutory rate of 21% principally because of the effect of the mix of U.S. and foreign incomes, state income taxes, section 162(m) excess compensation, tax credits, and a valuation allowance against certain U.S. federal and state deferred tax assets and the following discrete items recognized during the interim period: •Excess tax benefit recognized on stock option exercises and the vesting of restricted stock units during the three and nine months ended September 30, 2024 of $0.8 million and $3.8 million, respectively. •Unrecognized tax benefits released as a result of the expiration of statute of limitations during the three and nine months ended September 30, 2024 of $0.0 million and $4.0 million, respectively. •U.S. federal return-to-provision adjustments net of related tax reserves for the year ended December 31, 2023 resulted in a tax expense of $1.6 million for both the three and nine months ended September 30, 2024. The adjustments related primarily to changes in estimate for the research and development credit and an increase to the U.S. valuation allowance. The Company regularly assesses the realizability of deferred tax assets and records a valuation allowance to reduce the deferred tax assets to the amount that is more likely than not to be realized. In assessing the realizability of our deferred tax assets, we weigh all available positive and negative evidence. This evidence includes, but is not limited to, historical earnings, scheduled reversal of taxable temporary differences, tax planning strategies and projected future taxable income. Due to the weight of objectively verifiable negative evidence, the Company recorded a valuation allowance of $22.4 million and $42.9 million tax expense against certain U.S. federal and state deferred tax assets during the three and nine months ended September 30, 2024, respectively. The significant piece of objectively verifiable negative evidence evaluated was the recent U.S. cumulative losses. Our ability to use our deferred tax assets depends on the amount of taxable income in future periods. Based on current earnings and anticipated future earnings along with expected changes in our deferred tax asset and liability balances, it is likely that the current valuation allowance position will be adjusted during the year. An additional valuation allowance may be required beyond the current year if future earnings are not sufficient to support the realization of deferred tax assets. In 2021, the Organization for Economic Cooperation and Development ("OECD") released model rules for a 15% global minimum tax, known as Pillar Two. On December 15, 2022, the European Union agreed to implement the OECD’s global minimum tax of 15% for multinationals that meet a global revenue threshold. A number of countries have enacted or have announced plans to enact legislation to adopt Pillar Two. We considered the applicable tax law changes on Pillar Two implementation in the relevant countries, and there was no material impact to our tax provision for the three and nine months ended September 30, 2024. We do not expect the provisions currently in effect for 2024 to have a material impact on our tax provision and effective tax rate for the remainder of 2024 but will continue to assess the impact of tax legislation in the jurisdictions in which we operate. The effective tax rate for the three and nine months ended September 30, 2023 differs from the federal statutory rate of 21% principally because of the effect of the mix of U.S. and foreign incomes, state income taxes, section 162(m) excess compensation, foreign-derived intangible income ("FDII"), tax credits, and the following discrete items recognized during the interim period: •Excess tax benefit recognized on stock option exercises and the vesting of restricted stock units during the three and nine months ended September 30, 2023 of $0.6 million and $0.8 million, respectively. •Net unrecognized tax benefits resulting primarily from the expiration of statute of limitations during the three and nine months ended September 30, 2023 of $0.0 million and $6.0 million, respectively. •U.S. federal return-to-provision adjustments net of related tax reserves for the year ended December 31, 2022 resulted in a tax benefit of $7.5 million during the three and nine months ended September 30, 2023. The adjustments related primarily to changes in estimates for the research and development credit and foreign tax credits. •The revaluation of the contingent consideration during the three and nine months ended September 30, 2023 of $15.6 million and $12.3 million, respectively, resulted in a tax expense of $0.0 million for both periods.

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