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Income Taxes | 6 Months Ended
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Jun. 30, 2023
Income Taxes |
Income Taxes | Note 8. Income Taxes The Company’s loss before income taxes was entirely generated from its U.S. operations. As a result of its continuing losses, the Company had no provision for income taxes in the years ended December 31, 2022 and 2021, and the three and six months ended June 30, 2023 and 2022. As of December 31, 2022 and 2021, the Company had federal net operating loss (“NOL”) carryforwards of $67.5 and $54.3 million, respectively, which will begin to expire in 2036. The Company had state NOLs of $67.4 and $24.0 million as of December 31, 2022 and 2021, respectively, which will begin to expire in 2036. As of December 31, 2022 and 2021, the Company has federal research and development (“R&D”) credit carryforwards of $3.9 million and $1.7 million, respectively, which will begin to expire in 2039. As of December 31, 2022 and 2021, the Company also has California R&D credit carryforwards of $3.0 million and $1.5 million, respectively, which have an indefinite carryforward period. In general, if the Company experiences a greater than 50 percentage point aggregate change in ownership of certain significant stockholders over a three-year period (a “Section 382 ownership change”), utilization of its pre-change NOL carryforwards and the R&D credit carryforwards is subject to an annual limitation under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, and similar state laws. The annual limitation generally is determined by multiplying the value of the Company’s stock at the time of such ownership change, subject to certain adjustments, by the applicable long-term tax-exempt rate. Such limitations may result in expiration of a portion of the NOL carryforwards and R&D credit carryforwards before utilization and may be material. As of December 31, 2022, the Company has not determined to what extent a potential ownership change will impact the annual limitation that may be placed on the Company’s utilization of its NOL carryovers and R&D credit carryforwards. The components of deferred tax assets and liabilities were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ |  | 2022 |  | 2021
Deferred tax assets: |  | ​ |  |  | ​ |
Accrued compensation | ​ | $ | 296 | ​ | $ | 289
Accrued other expense | ​ |  | 123 | ​ |  | 114
Stock compensation | ​ |  | 5,303 | ​ |  | 3,913
Start-up costs and other intangibles | ​ |  | 13,727 | ​ |  | 14,104
Lease liability | ​ |  | 157 | ​ |  | 219
Net operating losses | ​ |  | 20,131 | ​ |  | 13,536
Capitalized Research and Development Expenses | ​ |  | 6,387 | ​ |  | —
Other | ​ |  | 32 | ​ |  | 22
​ | ​ |  | 46,156 | ​ |  | 32,197
Less: valuation allowance | ​ |  | (45,928) | ​ |  | (31,939)
Total deferred tax assets | ​ |  | 228 | ​ |  | 258
Deferred tax liabilities: | ​ |  |  | ​ |  |
Depreciation | ​ |  | (89) | ​ |  | (40)
ROU Asset | ​ |  | (139) | ​ |  | (218)
Total deferred tax liabilities | ​ |  | (228) | ​ |  | (258)
Net deferred income taxes | ​ | $ | — | ​ | $ | —
​ A reconciliation of the difference between the provision (benefit) for income taxes and income taxes at the statutory U.S. federal income tax rate is as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |
​ | ​ | 2022 | ​ | 2021 |
Income tax at statutory rate |  | 21.0 | % | 21.0 | %
Convertible notes |  | (1.8) | % | 0.3 | %
Stock compensation |  | (0.5) | % | (0.4) | %
Change in valuation allowance |  | (18.7) | % | (20.9) | %
Effective tax rate |  | 0.0 | % | 0.0 | %
​ A reconciliation of unrecognized tax benefits at the beginning and end of 2022 and 2021 is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ | ​ | 2022 | ​ | 2021
Balance, beginning of year | ​ | $ | 7,270 | ​ | $ | 4,989
Increases due to current year tax positions | ​ |  | 3,791 | ​ |  | 2,281
Decreases due to prior year tax positions | ​ |  | — | ​ |  | —
Balance, end of year | ​ | $ | 11,061 | ​ | $ | 7,270
​ The Company has considered the amounts and probabilities of the outcomes that can be realized upon ultimate settlement with the tax authorities and determined unrecognized tax benefits should be established of $11.1 million, $7.3 million as of December 31, 2022 and 2021, respectively. The Company’s effective income tax rate would not be impacted if the unrecognized tax benefits are recognized. The Company does not expect its unrecognized tax benefits to change significantly over the next 12 months. The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of income tax expense. There were no accrued interest and penalties associated with uncertain tax positions as of December 31, 2022. The Company’s tax returns for all years since inception are open for audit. The Company measures deferred tax assets and liabilities using enacted tax rates that will apply in the years in which the temporary differences are expected to be recovered or paid. On March 27, 2020, the President of the United States signed the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) into law. The CARES Act broadly provides entities tax payment relief and significant business incentives and makes certain technical corrections to the 2017 Tax Cuts and Jobs Act, or the Tax Act. The tax relief measures for entities include a five-year net operating loss carry back, increases interest expense deduction limits, acceleration of alternative minimum tax credit refunds, payroll tax relief, and a technical correction to allow accelerated deductions for qualified improvement property. On December 27, 2020, Congress passed, and President Trump signed into law, the Consolidated Appropriations Act, 2021 (the “Act”), which includes certain business tax provisions. ASC Topic 740, Income Taxes, requires the effect of changes in tax law be recognized in the period in which new legislation is enacted. The enactment of the CARES Act and Consolidated Appropriations Act, 2021 did not have a material impact on the Company’s consolidated financial position and results of operations as of December 31, 2022.

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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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