Summary of significant accounting policies	3 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]
Summary of significant accounting policies [Text Block]	2. Summary of significant accounting policies Basis of presentation and consolidation The accompanying unaudited condensed consolidated financial statements included herein have been prepared in conformity with generally accepted accounting principles in the United States ("GAAP") and under the rules and regulations of the United States Securities and Exchange Commission ("SEC") for interim reporting. The accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, that are necessary to present fairly the Company's financial position, results of operations, and cash flows. The condensed consolidated results of operations are not necessarily indicative of the results that may occur for the full fiscal year. Certain information and footnote disclosures of the Company normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted under the SEC's rules and regulations. These condensed consolidated financial statements should be read in conjunction with the audited financial statements and accompanying notes thereto for the year ended December 31, 2024, included in the Company's Annual Report on Form 10-K filed with the SEC on March 28, 2025 (the "2024 Annual Report"). These financial statements include the financial statements of the Company and its wholly-owned subsidiaries, SkinJect, Inc. and Medicus Pharma Inc. All intercompany balances and transactions have been eliminated on consolidation. The functional currency of the Company and its wholly-owned subsidiaries is the United States dollar. Use of estimates The preparation of these condensed consolidated financial statements in accordance with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements, and the reported amounts of income and expenses during the reporting period. Such estimates include the valuation of stock-based awards, the incremental borrowing rate used to discount the Company's operating lease liabilities, and the valuation allowance relating to the Company's deferred tax assets, all of which are management's best estimates. Estimates are based on historical experience, where applicable, and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. By their nature, these estimates are subject to measurement uncertainty and the effect on the financial statements of changes in estimates in future years could be significant. Management believes that the estimates utilized in preparing the financial statements are reasonable, however, actual results could differ from those estimates. Cash and cash equivalents Cash and cash equivalents include cash held at financial institutions and short-term investments in highly liquid marketable securities, having an original maturity of three months or less. The Company holds money market accounts with maturities of three months or less. These money market accounts are included in cash and cash equivalents on the accompanying consolidated balance sheets. Research and development All research and development costs are expensed as incurred. Research and development costs consist primarily of salaries, employee benefits, costs associated with preclinical studies and clinical trials (including amounts paid to clinical research organizations and other professional services). Payments made prior to the receipt of goods or services to be used in research and development are capitalized until the goods or services are received. The Company records accruals for estimated research and development costs, comprising payments for work performed by third party contractors, laboratories, participating clinical trial sites, and others. Some of these contractors bill monthly based on actual services performed, while others bill periodically based upon achieving certain contractual milestones. For the latter, the Company accrues the expenses as goods or services are used or rendered. Clinical trial site costs related to patient enrollment are accrued as patients enter and progress through the trial. Upfront costs, such as costs associated with setting up clinical trial sites for participation in the trials, are expensed immediately once incurred as research and development expenses. Stock-based compensation The Company expenses stock-based compensation to employees and non-employees over the requisite service period based on the estimated grant-date fair value of the awards. The Company records the expense for stock-based compensation awards subject to vesting over the requisite service period. The Company estimates the fair value of stock option grants and shares purchasable under the Company's Equity Incentive Plan (the "Plan") using the Black-Scholes option pricing model, and the assumptions used in calculating the fair value of stock-based awards represent management's best estimates and involve inherent uncertainties and the application of management's judgment. The Company accounts for forfeitures as they occur. All stock-based compensation costs are recorded in the statements of operations and comprehensive loss based upon the underlying employees or non-employee's roles within the Company. Net loss per share Basic net loss per share is calculated by dividing net loss by the weighted average number of shares outstanding during the period. Diluted net loss per share is calculated by dividing net loss by the sum of the weighted average number of shares outstanding and all additional shares that would have been outstanding if potentially dilutive shares had been exercised at the beginning of the period. Income Taxes Income taxes are recorded in accordance with ASC 740, Income Taxes, which provides for deferred taxes using an asset and liability approach. Deferred tax assets and liabilities are determined based on the differences between the financial reporting and tax bases of assets and liabilities and net operating loss and credit carryforwards using enacted tax rates in effect for the year in which the differences are expected to impact taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. For the three months ended March 31, 2025 and 2024, the Company recorded zero income tax expense. No tax benefit has been recorded in relation to the pre-tax loss for the three months ended March 31, 2025 and 2024, due to a full valuation allowance to offset any deferred tax asset related to net operating loss carry forwards attributable to the losses. Fair value of financial instruments Financial instruments, including cash and cash equivalents and accounts payable are carried at cost, which management believes approximates fair value due to the short-term nature of these instruments. The fair value of lease obligations approximates their carrying amounts as a market rate of interest is attached to their repayment. The Company measures the fair value of financial assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The Company uses three levels of inputs that may be used to measure fair value: Level 1-Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for identical assets or liabilities as of the reporting date. Level 2- Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3-Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management's estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity. Concentration of credit risk Cash and cash equivalents are financial instruments that are potentially subject to concentrations of credit risk. The Company's cash and cash equivalents are deposited in accounts at large financial institutions, and amounts may exceed federally insured limits. The Company believes it is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash and cash equivalents are held. The Company maintains its cash equivalents in money market funds that invest in U.S. Treasury and agency securities. Foreign currency transactions Foreign exchange transaction gains and losses are included in general and administrative expense in the Company's consolidated statement of operations and comprehensive loss. Operating segments Operating segments are identified as components of an entity about which separate discrete financial information is available for evaluation by the chief operating decision-maker ("CODM") in making decisions regarding resource allocation and assessing performance. The Company views its operations and manages its business in one operating segment. Recently adopted accounting pronouncements In November 2023, the FASB issued ASU 2023-07 "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures" to expand the disclosures required by public entities for reportable segments, thereby responding to stakeholders' requests for more detailed information about expenses within each reportable segment. The expanded disclosures now require public entities to disclose significant expenses for reportable segments in both interim and in annual reporting periods, while entities with only a single reportable segment must now provide all segment disclosures required both in ASC 280 and under the amendments in ASU 2023-07. ASU 2023-07 is effective for interim periods beginning January 1, 2025. See Note 11 for enhanced segment reporting disclosures. In December 2023, the FASB issued ASU 2023-09 "Income Taxes (Topics 740): Improvements to Income Tax Disclosures" to expand the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. ASU 2023-09 is effective for our annual periods beginning January 1, 2025, with early adoption permitted. The disclosures will be implemented as required for the year-ended December 31, 2025. The Company is currently evaluating the impact of adopting this guidance. Recently issued accounting pronouncements In November 2024, the FASB issued ASU 2024-03 "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures" to provide greater transparency about the components of specific expense categories in the income statements. The effective dates of ASU 2024-03 were subsequently clarified by ASU 2025-01. ASU 2025-01 is effective for our annual period beginning January 1, 2027, with early adoption permitted. We are currently evaluating the potential effect that the updated standard will have on our financial statement disclosures. In November 2024, the FASB issued ASU 2024-04 "Debt-Debt with Conversion and Other Options (Subtopic 470-20: Induced Conversions of Convertible Debt Instruments", to improve consistency and relevance of accounting for induced conversions of convertible debt instruments and it addresses scenarios involving convertible debt instruments and cash conversion features and those not currently convertible. ASU 2024-04 is effective for our annual period beginning January 1, 2026, with early adoption permitted for entities that adopted the amendment in ASU 2020-06. We are currently evaluating the potential effect that the updated standard will have on our financial statement disclosures. There were no other significant updates to the recently issued accounting standards which may be applicable to the Company. Although there are several other new accounting pronouncements issued or proposed by the FASB, the Company does not believe any of those accounting pronouncements have had or will have a material impact on its financial position or operating results.

2. Summary of significant accounting policies

Basis of presentation and consolidation

The accompanying unaudited condensed consolidated financial statements included herein have been prepared in conformity with generally accepted accounting principles in the United States ("GAAP") and under the rules and regulations of the United States Securities and Exchange Commission ("SEC") for interim reporting. The accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, that are necessary to present fairly the Company's financial position, results of operations, and cash flows. The condensed consolidated results of operations are not necessarily indicative of the results that may occur for the full fiscal year. Certain information and footnote disclosures of the Company normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted under the SEC's rules and regulations. These condensed consolidated financial statements should be read in conjunction with the audited financial statements and accompanying notes thereto for the year ended December 31, 2024, included in the Company's Annual Report on Form 10-K filed with the SEC on March 28, 2025 (the "2024 Annual Report"). These financial statements include the financial statements of the Company and its wholly-owned subsidiaries, SkinJect, Inc. and Medicus Pharma Inc. All intercompany balances and transactions have been eliminated on consolidation. The functional currency of the Company and its wholly-owned subsidiaries is the United States dollar.

Use of estimates

The preparation of these condensed consolidated financial statements in accordance with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements, and the reported amounts of income and expenses during the reporting period. Such estimates include the valuation of stock-based awards, the incremental borrowing rate used to discount the Company's operating lease liabilities, and the valuation allowance relating to the Company's deferred tax assets, all of which are management's best estimates. Estimates are based on historical experience, where applicable, and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. By their nature, these estimates are subject to measurement uncertainty and the effect on the financial statements of changes in estimates in future years could be significant. Management believes that the estimates utilized in preparing the financial statements are reasonable, however, actual results could differ from those estimates.

Cash and cash equivalents

Cash and cash equivalents include cash held at financial institutions and short-term investments in highly liquid marketable securities, having an original maturity of three months or less. The Company holds money market accounts with maturities of three months or less. These money market accounts are included in cash and cash equivalents on the accompanying consolidated balance sheets.

Research and development

All research and development costs are expensed as incurred. Research and development costs consist primarily of salaries, employee benefits, costs associated with preclinical studies and clinical trials (including amounts paid to clinical research organizations and other professional services). Payments made prior to the receipt of goods or services to be used in research and development are capitalized until the goods or services are received.

The Company records accruals for estimated research and development costs, comprising payments for work performed by third party contractors, laboratories, participating clinical trial sites, and others. Some of these contractors bill monthly based on actual services performed, while others bill periodically based upon achieving certain contractual milestones. For the latter, the Company accrues the expenses as goods or services are used or rendered. Clinical trial site costs related to patient enrollment are accrued as patients enter and progress through the trial. Upfront costs, such as costs associated with setting up clinical trial sites for participation in the trials, are expensed immediately once incurred as research and development expenses.

Stock-based compensation

The Company expenses stock-based compensation to employees and non-employees over the requisite service period based on the estimated grant-date fair value of the awards. The Company records the expense for stock-based compensation awards subject to vesting over the requisite service period. The Company estimates the fair value of stock option grants and shares purchasable under the Company's Equity Incentive Plan (the "Plan") using the Black-Scholes option pricing model, and the assumptions used in calculating the fair value of stock-based awards represent management's best estimates and involve inherent uncertainties and the application of management's judgment. The Company accounts for forfeitures as they occur. All stock-based compensation costs are recorded in the statements of operations and comprehensive loss based upon the underlying employees or non-employee's roles within the Company.

Net loss per share

Basic net loss per share is calculated by dividing net loss by the weighted average number of shares outstanding during the period. Diluted net loss per share is calculated by dividing net loss by the sum of the weighted average number of shares outstanding and all additional shares that would have been outstanding if potentially dilutive shares had been exercised at the beginning of the period.

Income Taxes

Income taxes are recorded in accordance with ASC 740, Income Taxes, which provides for deferred taxes using an asset and liability approach. Deferred tax assets and liabilities are determined based on the differences between the financial reporting and tax bases of assets and liabilities and net operating loss and credit carryforwards using enacted tax rates in effect for the year in which the differences are expected to impact taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized. For the three months ended March 31, 2025 and 2024, the Company recorded zero income tax expense. No tax benefit has been recorded in relation to the pre-tax loss for the three months ended March 31, 2025 and 2024, due to a full valuation allowance to offset any deferred tax asset related to net operating loss carry forwards attributable to the losses.

Fair value of financial instruments

Financial instruments, including cash and cash equivalents and accounts payable are carried at cost, which management believes approximates fair value due to the short-term nature of these instruments. The fair value of lease obligations approximates their carrying amounts as a market rate of interest is attached to their repayment. The Company measures the fair value of financial assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The Company uses three levels of inputs that may be used to measure fair value:

Level 1-Inputs used to measure fair value are unadjusted quoted prices that are available in active markets for identical assets or liabilities as of the reporting date.

Level 2- Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3-Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment are used to measure fair value. These values are generally determined using pricing models for which the assumptions utilize management's estimates of market participant assumptions. The determination of fair value for Level 3 investments and other financial instruments involves the most management judgment and subjectivity.

Concentration of credit risk

Cash and cash equivalents are financial instruments that are potentially subject to concentrations of credit risk. The Company's cash and cash equivalents are deposited in accounts at large financial institutions, and amounts may exceed federally insured limits. The Company believes it is not exposed to significant credit risk due to the financial strength of the depository institutions in which the cash and cash equivalents are held. The Company maintains its cash equivalents in money market funds that invest in U.S. Treasury and agency securities.

Foreign currency transactions

Foreign exchange transaction gains and losses are included in general and administrative expense in the Company's consolidated statement of operations and comprehensive loss.

Operating segments

Operating segments are identified as components of an entity about which separate discrete financial information is available for evaluation by the chief operating decision-maker ("CODM") in making decisions regarding resource allocation and assessing performance. The Company views its operations and manages its business in one operating segment.

Recently adopted accounting pronouncements

In November 2023, the FASB issued ASU 2023-07 "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures" to expand the disclosures required by public entities for reportable segments, thereby responding to stakeholders' requests for more detailed information about expenses within each reportable segment. The expanded disclosures now require public entities to disclose significant expenses for reportable segments in both interim and in annual reporting periods, while entities with only a single reportable segment must now provide all segment disclosures required both in ASC 280 and under the amendments in ASU 2023-07. ASU 2023-07 is effective for interim periods beginning January 1, 2025. See Note 11 for enhanced segment reporting disclosures.

In December 2023, the FASB issued ASU 2023-09 "Income Taxes (Topics 740): Improvements to Income Tax Disclosures" to expand the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. ASU 2023-09 is effective for our annual periods beginning January 1, 2025, with early adoption permitted. The disclosures will be implemented as required for the year-ended December 31, 2025. The Company is currently evaluating the impact of adopting this guidance.

Recently issued accounting pronouncements

In November 2024, the FASB issued ASU 2024-03 "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures" to provide greater transparency about the components of specific expense categories in the income statements. The effective dates of ASU 2024-03 were subsequently clarified by ASU 2025-01. ASU 2025-01 is effective for our annual period beginning January 1, 2027, with early adoption permitted. We are currently evaluating the potential effect that the updated standard will have on our financial statement disclosures.

In November 2024, the FASB issued ASU 2024-04 "Debt-Debt with Conversion and Other Options (Subtopic 470-20: Induced Conversions of Convertible Debt Instruments", to improve consistency and relevance of accounting for induced conversions of convertible debt instruments and it addresses scenarios involving convertible debt instruments and cash conversion features and those not currently convertible. ASU 2024-04 is effective for our annual period beginning January 1, 2026, with early adoption permitted for entities that adopted the amendment in ASU 2020-06. We are currently evaluating the potential effect that the updated standard will have on our financial statement disclosures.

There were no other significant updates to the recently issued accounting standards which may be applicable to the Company. Although there are several other new accounting pronouncements issued or proposed by the FASB, the Company does not believe any of those accounting pronouncements have had or will have a material impact on its financial position or operating results.