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Income Taxes | 12 Months Ended
--- | ---
Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Income Taxes | 18. Income Taxes The following table summarizes the (loss) income before income tax expense by jurisdiction for the periods indicated:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Domestic |  | $ | (338,942 | ) |  | $ | (84,113 | ) |  | $ | (65,940 | )
Foreign |  |  | 126 |  |  |  | 162 |  |  |  | 280 |
Loss before income tax expense |  | $ | (338,816 | ) |  | $ | (83,951 | ) |  | $ | (65,660 | )
For the year ended December 31, 2023, the Company recognized no provision or benefit from income taxes. For both the years ended December 31, 2022 and 2021, the Company recognized an income tax expense of $0.1 million, related to foreign subsidiaries income tax expense and the Texas margins tax. The difference between the Company’s provision for income taxes and the amounts computed by applying the statutory federal income tax rate to income before income taxes is as follows (in thousands):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Tax provision derived by applying the federal statutory rate to income before income taxes |  | $ | (71,151 | ) |  | $ | (17,630 | ) |  | $ | (13,789 | )
Loss on forward contract valuation |  |  | 17,541 |  |  |  | — |  |  |  | — |
Acquired IPR&D |  |  | 27,340 |  |  |  | — |  |  |  | — |
Loss on CVR revaluation |  |  | 3,987 |  |  |  | — |  |  |  | — |
Other permanent differences |  |  | 4,472 |  |  |  | 1,042 |  |  |  | 1,002 |
Federal tax credits |  |  | (1 | ) |  |  | (3,559 | ) |  |  | (3,815 | )
State tax credits |  |  | — |  |  |  | (640 | ) |  |  | (152 | )
Effect of tax rate on foreign jurisdiction |  |  | (53 | ) |  |  | 42 |  |  |  | (5 | )
Change in the valuation allowance |  |  | 17,839 |  |  |  | 20,609 |  |  |  | 16,900 |
Income tax (benefit) expense |  | $ | (26 | ) |  | $ | (136 | ) |  | $ | 141 |
The components of the deferred tax assets and liabilities consist of the following (in thousands):
|  | December 31, |
|  | 2023 |  |  | 2022 |
Deferred tax assets |  |  |  |  |  |  |  |
Net operating loss carryforward |  | $ | 74,454 |  |  | $ | 68,917 |
Capitalized 174 R&D costs |  |  | 22,532 |  |  |  | 11,097 |
Intangible assets |  |  | 47 |  |  |  | 52 |
Deferred revenue |  |  | — |  |  |  | 566 |
Accrued expense |  |  | 579 |  |  |  | 668 |
Stock-based compensation |  |  | 4,246 |  |  |  | 3,293 |
Federal tax credits |  |  | 21,914 |  |  |  | 21,914 |
State tax credits |  |  | 1,631 |  |  |  | 1,631 |
Other |  |  | 88 |  |  |  | 190 |
Total deferred tax assets |  |  | 125,491 |  |  |  | 108,328 |
Deferred tax liabilities |  |  |  |  |  |  |  |
Depreciable assets |  |  | — |  |  |  | (676 | )
Total deferred tax liabilities |  |  | — |  |  |  | (676 | )
Less: Valuation allowance |  |  | (125,491 | ) |  |  | (107,652 | )
Deferred tax assets, net |  | $ | — |  |  | $ | — |
The Company has established a full federal and state valuation allowance equal to the net deferred tax assets due to uncertainties regarding the realization of the deferred tax asset based on the Company’s lack of earnings history. The valuation allowance increased by $17.8 million, $20.6 million, and $16.9 million during the years ended December 31, 2023, 2022, and 2021, respectively, primarily due to continuing loss from operations. As of December 31, 2023 and 2022, the Company had U.S. net operating loss carryforwards (“NOL”) of $354.5 million and $328.2 million, respectively. For both the years ended December 31, 2023 and 2022, the Company had U.S. tax credit carryforwards and state tax credit carryforwards of $21.9 million and $1.6 million, respectively. Of the net operating loss and tax credit carryforwards $58.4 million and $21.9 million, respectively, will expire in 2033, if not utilized. Any remaining net operating loss will carry forward indefinitely and can be utilized to offset up to 80% of the taxable income in any tax year. The net operating loss and credit carryforwards are subject to Internal Revenue Service adjustments until the statute closes on the year the net operating loss or tax credits are utilized. The Company has not completed a study to assess whether an ownership change has occurred or whether there have been multiple ownership changes since the Company’s formation due to the complexity and cost associated with such a study, and the fact that there may be additional such ownership changes in the future. If the Company has experienced an ownership change at any time since its formation, utilization of the NOL or research and development credit carryforwards would be subject to an annual limitation under Section 382 or 383 of the Internal Revenue Code, which is determined by first multiplying the value of the Company’s stock at the time of the ownership change by the applicable long-term, tax-exempt rate, and then could be subject to additional adjustments, as required. Additionally, the separate return limitation year (“SRLY”) rules may apply to losses of the Company’s eight wholly owned U.S. subsidiary corporations. The SRLY rules limit the consolidated group’s use of a subsidiary corporation’s net operating losses to the amount of income generated by the subsidiary corporation after it becomes a member of the group. Any limitation may result in expiration of a portion of the NOL or research and development credit carryforwards before utilization. Further, until a study is completed and any limitation known, no amounts are being considered as an uncertain tax position or disclosed as an unrecognized tax benefit. Additionally, the Company does not expect any unrecognized tax benefits to change significantly over the next twelve months. Due to the existence of the valuation allowance, future changes in the Company’s unrecognized tax benefits will not impact its effective tax rate. Any carryforwards that will expire prior to utilization as a result of such limitations will be removed from deferred tax assets with a corresponding reduction of the valuation allowance. The Company is subject to examination by taxing authorities in its significant jurisdictions for the 2019 and subsequent years. However, due to NOL and tax attribute carryovers, the taxing authorities have the ability to adjust the NOLs and other tax attributes related to closed years. As of December 31, 2023 and 2022, there were no amounts recorded for uncertain tax positions. As of December 31, 2023, undistributed earnings of the Company’s incorporated foreign subsidiaries are immaterial. Under the Global Intangible Low-Taxed Income (“GILTI”) provisions of the 2017 Tax Cuts and Jobs Act, U.S. income taxes have been incurred on the undistributed earnings of the foreign subsidiaries and therefore, the tax impact upon distribution is limited to state income and withholding taxes and is not material.

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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 -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480990/946-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//740/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-14 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-21 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 270 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482526/740-270-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 17 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-17 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482603/740-30-50-2 + Details
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