Basis of presentation and summary of significant accounting policies (Policies)	12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Basis of presentation	Basis of presentationThe accompanying consolidated financial statements are presented in United States (“U.S.”) dollars and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The financial results are presented on a consolidated basis. All intercompany transactions are eliminated on consolidation. In July 2020, the Company sold all of the issued and outstanding capital stock of Aquinox Pharmaceuticals (Canada) (“Aquinox Canada”) to an unrelated third party, as further described in Note 16, Sale of Aquinox Canada. On December 31, 2020, Neoleukin Corporation, the Company's wholly owned subsidiary, was merged into the Company. As a result, the Company consists of a single operating company without any subsidiaries at December 31, 2020.
Use of estimates and assumptions	Use of estimates and assumptionsThe preparation of consolidated financial statements in conformity with U.S. 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 at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. Significant areas requiring estimates include valuation and recognition of stock-based compensation, the incremental borrowing rate utilized in the measurement of operating and finance lease liabilities, amortization and depreciation of property, plant and equipment and intangible assets, and pre-clinical, clinical, and other accruals. Actual results could differ from those estimates.
Reclassification	ReclassificationThe Company reclassified amounts related to prior year amortization of operating lease right-of-use assets, loss on disposal of property and equipment, changes in operating lease liabilities, and payment of offering costs in the consolidated statements of cash flows to conform to current year presentation. This reclassification had no effect on cash used in operating activities or cash provided by financing activities.
Leases	Leases At contract inception, the Company determines if the contract is or contains a lease. Lease liabilities are recognized on the lease commencement date based on the estimated present value of lease payments over the lease term. To determine the present value of the lease payments, the Company utilizes its estimated incremental borrowing rate based on information available at the lease commencement date as the interest rate implicit in the lease is typically not readily determinable. The related right-of-use assets are recorded net of any lease incentives received. Variable lease cost primarily includes building operating expenses as charged to the Company by its landlords. We include options to extend the lease in our lease liability and right-of-use asset when it is reasonably certain that we will exercise that option. None of our options to extend the rental term of any existing leases were considered reasonably certain as of December 31, 2020. For leases of office space, the Company has elected to not separate the lease components from the non-lease components. For leases of office space with a lease term of 12 months or less and which do not include an option to purchase the underlying asset, the Company has elected to recognize the lease payments in the statement of operations on a straight-line basis over the lease term.
Cash, cash equivalents, and restricted cash	Cash, cash equivalents, and restricted cash All highly liquid investments with maturities of three months or less at the date of acquisition are considered to be cash equivalents. Restricted cash, included in Other non-current assets in the consolidated balance sheets, includes cash deposits the Company maintains with its bank as collateral for the irrevocable letters of credits related to its lease obligations.
Property and equipment	Property and equipment Property and equipment are recorded at cost and are amortized using the straight-line basis over a range of three to seven years. Expenditures for improvements to the Company’s office spaces are capitalized and expenditures for maintenance and repairs are expensed as incurred. Leasehold improvements are amortized over the lesser of useful life and term of the lease. The Company reviews the carrying value of property and equipment for impairment whenever events and circumstances indicate that the carrying value of an asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of assets. The factors considered by management in performing this assessment include current operating results, trends and prospects, the manner in which the property is used, and the effects of obsolescence, demand, competition, and other economic factors. Based on management’s assessment there were no indicators of impairment of property and equipment as at December 31, 2020 and 2019.
Earnings (loss) per share	Earnings (loss) per shareBasic net loss per share is calculated by dividing the net loss by the weighted average number of shares of common stock outstanding for the period, without consideration for common stock equivalents. Common stock equivalents are included in the calculation of diluted earnings per share only in periods of net income. Such common stock equivalents are excluded in the calculation of diluted net loss per share in periods of net loss as inclusion of such amounts would be anti-dilutive. Outstanding pre-funded warrants as of December 31, 2020 of 12,663,010 are considered outstanding as of their issuance date and are included in the basic and diluted net loss per share calculation because they are fully vested and exercisable at any time for a nominal cash consideration.
Asset acquisitions/Intangible assets	Asset acquisitions/Intangible assets At the time of acquisition, the Company determines if a transaction should be accounted for as a business combination or acquisition of assets. For an acquisition of assets, the cost of acquiring the asset group, including transaction costs, is allocated to the acquired assets and assumed liabilities based on their relative fair values without giving rise to goodwill. Acquired in-process research and development assets are expensed if management determines that the assets do not have an alternative future use. Other long-lived intangible assets are recorded at the acquired cost and amortized using the straight-line method over their estimated useful life. The intangible asset is tested for impairment when events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The Company recognizes an impairment loss when carrying amount is not recoverable and the estimated fair value of the intangible asset is less than its carrying value.
Income taxes	Income taxes The Company accounts for income taxes using an asset and liability approach that requires the recognition of deferred tax assets and liabilities for the differences between events that have been recognized in the Company’s consolidated financial statements and the tax bases of assets and liabilities recognized at enacted tax rates. In estimating future tax consequences, Accounting Standards Codification ("ASC") 740 generally considers all expected future events other than enactments of and changes in the tax law or rates. The measurement of deferred tax assets is reduced, if necessary, by the extent of the valuation allowance. We will establish a valuation allowance for deferred tax assets if it is more likely than not that these items will expire before we are able to realize their benefits or that future deductibility is uncertain. Investment tax credits relating to scientific research and experimental development are accounted for as a reduction in operating expenses. They are recorded in the period when there is reasonable assurance the credits will be realized. If investment tax credit amounts subsequently received are less or more than originally recorded, the difference is treated as a change in estimate.
Research and development costs	Research and development costs Research and development costs are charged to expense as incurred and include items such as: employee related expenses, including salaries and benefits, expenses incurred under agreements with contract research organizations that conduct clinical trials and preclinical studies, the cost of acquiring, developing and manufacturing clinical trial materials, facilities, and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, and other supplies and costs associated with clinical trials, preclinical activities, and regulatory operations. Restructuring costs associated with the termination of research and development programs and related employees are included in research and development costs. Development costs are expensed in the period incurred unless management believes a development project meets generally accepted accounting criteria for deferral and amortization. No product development expenditures have been deferred to date. The Company records costs for certain development activities based on management’s evaluation of the progress to completion of specific tasks or information provided to the Company by vendors on their actual costs incurred. Payments for these activities are based on the terms of the individual arrangements, which may differ from the pattern of costs incurred, and are reflected in the consolidated financial statements as prepaid or accrued expense.
Accounting for stock-based compensation	Accounting for stock-based compensation The Company has issued stock options and restricted stock units (“RSUs”). The Company measures the cost of services received in exchange for an award of equity instruments based on the grant-date fair value of the award. The cost of such award is recognized on a straight-line basis over the requisite service period, which is generally the vesting period. The Company accounts for forfeitures as they occur. We utilize newly issued shares to satisfy option exercises. The Company estimates the fair value of options using the Black-Scholes option pricing model on the grant date. This approximation uses assumptions regarding a number of inputs that requires management to make significant estimates and judgments. The expected term represents the period that the Company’s stock-based awards are expected to be outstanding. As the Company does not have sufficient historical experience for determining the expected term of the stock option awards granted, the Company has based its expected term for awards issued to employees on the simplified method, which represents the average period from vesting to the expiration of the stock option. In addition, the Company does not have sufficient trading history for the Company’s common stock, and therefore, the expected stock price volatility for the Company’s common stock was estimated by taking the average historical price volatility for industry peers. The Company has never declared or paid any cash dividends to common stockholders and does not presently plan to pay cash dividends in the foreseeable future. Consequently, the Company used an expected dividend yield of zero. The risk-free interest rate was based on the yields of treasury securities with maturities similar to the expected term of the options for each option group. The fair value of each RSU is measured using the closing price of the Company’s common stock on the date of grant.
Restructuring costs	Restructuring costs The Company accounts for restructuring costs in accordance with ASC 420, Exit or Disposal Cost Obligations. ASC 420 specifies that a liability for a cost associated with an exit or disposal activity be recognized when the liability is incurred, except for a liability where employees are required to render service until they are terminated in order to receive termination benefits and will be retained to render service beyond the minimum retention period. A liability for such one-time termination benefits shall be measured initially at the communication date based on the fair value of the liability as of the termination date and recognized ratably over the future service period. The charges that the Company expects to incur in connection with the restructuring are subject to a number of assumptions, and actual results may differ materially. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the restructuring plan.
Segment reporting	Segment reportingThe Company operates in one segment, the research and development of de novo protein therapeutics using sophisticated computational algorithms and methods to address unmet medical needs. Our primary areas of focus are in oncology, inflammation, and autoimmunity. The Company’s operations and its assets are held in the United States.
Fair value of financial instruments	Fair value of financial instrumentsThe carrying amounts of certain of the Company’s financial instruments, including cash, cash equivalents, receivables, accounts payable and other liabilities, approximate their fair values because of their nature and/or short maturities.
Concentration of credit risk	Concentration of credit riskFinancial instruments, which potentially subject the Company to significant concentrations of credit risk, consist primarily of cash and cash equivalents. Cash and cash equivalents are invested in accordance with the Company’s investment policy. The primary objective for the Company’s investment portfolio is the preservation of capital and maintenance of liquidity and includes guidelines on the quality of financial instruments and defines allowable investments that the Company believes minimizes the exposure to concentration of credit risk.
Recently issued and recently adopted accounting standards	Recently issued and recently adopted accounting standards In December 2019, the FASB issued ASU 2019-12 “Simplifying the Accounting for Income Taxes.” The objective of the standard is to improve areas of GAAP by removing certain exceptions permitted by ASC Topic 740-- Income Taxes and clarifying existing guidance to facilitate consistent application. ASU 2019-12 is effective for fiscal years and interim periods beginning after December 15, 2020. The Company has incurred net losses since its inception and maintains a full valuation allowance on the net deferred tax assets. As such, the Company does not expect the adoption of this standard to have a material impact on the financial condition, results of operations and cash flows, or financial statement disclosures. In August 2018, the FASB issued “ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” The objective of the standard is to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The Company adopted this standard on January 1, 2020 on a prospective basis. The adoption of this ASU did not have a material impact on the Company’s financial condition, results of operations, cash flows, and financial statement disclosures.

Basis of presentation and summary of significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2020

Basis of presentationThe accompanying consolidated financial statements are presented in United States (“U.S.”) dollars and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The financial results are presented on a consolidated basis. All intercompany transactions are eliminated on consolidation. In July 2020, the Company sold all of the issued and outstanding capital stock of Aquinox Pharmaceuticals (Canada) (“Aquinox Canada”) to an unrelated third party, as further described in Note 16, Sale of Aquinox Canada. On December 31, 2020, Neoleukin Corporation, the Company's wholly owned subsidiary, was merged into the Company. As a result, the Company consists of a single operating company without any subsidiaries at December 31, 2020.

Use of estimates and assumptions

Use of estimates and assumptionsThe preparation of consolidated financial statements in conformity with U.S. 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 at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. Significant areas requiring estimates include valuation and recognition of stock-based compensation, the incremental borrowing rate utilized in the measurement of operating and finance lease liabilities, amortization and depreciation of property, plant and equipment and intangible assets, and pre-clinical, clinical, and other accruals. Actual results could differ from those estimates.

Reclassification

ReclassificationThe Company reclassified amounts related to prior year amortization of operating lease right-of-use assets, loss on disposal of property and equipment, changes in operating lease liabilities, and payment of offering costs in the consolidated statements of cash flows to conform to current year presentation. This reclassification had no effect on cash used in operating activities or cash provided by financing activities.

Leases

At contract inception, the Company determines if the contract is or contains a lease. Lease liabilities are recognized on the lease commencement date based on the estimated present value of lease payments over the lease term. To determine the present value of the lease payments, the Company utilizes its estimated incremental borrowing rate based on information available at the lease commencement date as the interest rate implicit in the lease is typically not readily determinable. The related right-of-use assets are recorded net of any lease incentives received. Variable lease cost primarily includes building operating expenses as charged to the Company by its landlords.

We include options to extend the lease in our lease liability and right-of-use asset when it is reasonably certain that we will exercise that option. None of our options to extend the rental term of any existing leases were considered reasonably certain as of December 31, 2020.

For leases of office space, the Company has elected to not separate the lease components from the non-lease components.

For leases of office space with a lease term of 12 months or less and which do not include an option to purchase the underlying asset, the Company has elected to recognize the lease payments in the statement of operations on a straight-line basis over the lease term.

Cash, cash equivalents, and restricted cash

All highly liquid investments with maturities of three months or less at the date of acquisition are considered to be cash equivalents.

Restricted cash, included in Other non-current assets in the consolidated balance sheets, includes cash deposits the Company maintains with its bank as collateral for the irrevocable letters of credits related to its lease obligations.

Property and equipment

Property and equipment are recorded at cost and are amortized using the straight-line basis over a range of three to seven years. Expenditures for improvements to the Company’s office spaces are capitalized and expenditures for maintenance and repairs are expensed as incurred. Leasehold improvements are amortized over the lesser of useful life and term of the lease.

The Company reviews the carrying value of property and equipment for impairment whenever events and circumstances indicate that the carrying value of an asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. In cases where undiscounted expected future cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of assets. The factors considered by management in performing this assessment include current operating results, trends and prospects, the manner in which the property is used, and the effects of obsolescence, demand, competition, and other economic factors. Based on management’s assessment there were no indicators of impairment of property and equipment as at December 31, 2020 and 2019.

Earnings (loss) per share

Earnings (loss) per shareBasic net loss per share is calculated by dividing the net loss by the weighted average number of shares of common stock outstanding for the period, without consideration for common stock equivalents. Common stock equivalents are included in the calculation of diluted earnings per share only in periods of net income. Such common stock equivalents are excluded in the calculation of diluted net loss per share in periods of net loss as inclusion of such amounts would be anti-dilutive. Outstanding pre-funded warrants as of December 31, 2020 of 12,663,010 are considered outstanding as of their issuance date and are included in the basic and diluted net loss per share calculation because they are fully vested and exercisable at any time for a nominal cash consideration.

Asset acquisitions/Intangible assets

At the time of acquisition, the Company determines if a transaction should be accounted for as a business combination or acquisition of assets.

For an acquisition of assets, the cost of acquiring the asset group, including transaction costs, is allocated to the acquired assets and assumed liabilities based on their relative fair values without giving rise to goodwill. Acquired in-process research and development assets are expensed if management determines that the assets do not have an alternative future use. Other long-lived intangible assets are recorded at the acquired cost and amortized using the straight-line method over their estimated useful life.

The intangible asset is tested for impairment when events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The Company recognizes an impairment loss when carrying amount is not recoverable and the estimated fair value of the intangible asset is less than its carrying value.

Income taxes

The Company accounts for income taxes using an asset and liability approach that requires the recognition of deferred tax assets and liabilities for the differences between events that have been recognized in the Company’s consolidated financial statements and the tax bases of assets and liabilities recognized at enacted tax rates. In estimating future tax consequences, Accounting Standards Codification ("ASC") 740 generally considers all expected future events other than enactments of and changes in the tax law or rates. The measurement of deferred tax assets is reduced, if necessary, by the extent of the valuation allowance. We will establish a valuation allowance for deferred tax assets if it is more likely than not that these items will expire before we are able to realize their benefits or that future deductibility is uncertain.

Investment tax credits relating to scientific research and experimental development are accounted for as a reduction in operating expenses. They are recorded in the period when there is reasonable assurance the credits will be realized. If investment tax credit amounts subsequently received are less or more than originally recorded, the difference is treated as a change in estimate.

Research and development costs

Research and development costs are charged to expense as incurred and include items such as: employee related expenses, including salaries and benefits, expenses incurred under agreements with contract research organizations that conduct clinical trials and preclinical studies, the cost of acquiring, developing and manufacturing clinical trial materials, facilities, and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, and other supplies and costs associated with clinical trials, preclinical activities, and regulatory operations. Restructuring costs associated with the termination of research and development programs and related employees are included in research and development costs.

Development costs are expensed in the period incurred unless management believes a development project meets generally accepted accounting criteria for deferral and amortization. No product development expenditures have been deferred to date. The Company records costs for certain development activities based on management’s evaluation of the progress to completion of specific tasks or information provided to the Company by vendors on their actual costs incurred. Payments for these activities are based on the terms of the individual arrangements, which may differ from the pattern of costs incurred, and are reflected in the consolidated financial statements as prepaid or accrued expense.

Accounting for stock-based compensation

The Company has issued stock options and restricted stock units (“RSUs”). The Company measures the cost of services received in exchange for an award of equity instruments based on the grant-date fair value of the award. The cost of such award is recognized on a straight-line basis over the requisite service period, which is generally the vesting period. The Company accounts for forfeitures as they occur. We utilize newly issued shares to satisfy option exercises.

The Company estimates the fair value of options using the Black-Scholes option pricing model on the grant date. This approximation uses assumptions regarding a number of inputs that requires management to make significant estimates and judgments. The expected term represents the period that the Company’s stock-based awards are expected to be outstanding. As the Company does not have sufficient historical experience for determining the expected term of the stock option awards granted, the Company has based its expected term for awards issued to employees on the simplified method, which represents the average period from vesting to the expiration of the stock option. In addition, the Company does not have sufficient trading history for the Company’s common stock, and therefore, the expected stock price volatility for the Company’s common stock was estimated by taking the average historical price volatility for industry peers. The Company has never declared or paid any cash dividends to common stockholders and does not presently plan to pay cash dividends in the foreseeable future. Consequently, the Company used an expected dividend yield of zero. The risk-free interest rate was based on the yields of treasury securities with maturities similar to the expected term of the options for each option group.

The fair value of each RSU is measured using the closing price of the Company’s common stock on the date of grant.

Restructuring costs

The Company accounts for restructuring costs in accordance with ASC 420, Exit or Disposal Cost Obligations. ASC 420 specifies that a liability for a cost associated with an exit or disposal activity be recognized when the liability is incurred, except for a liability where employees are required to render service until they are terminated in order to receive termination benefits and will be retained to render service beyond the minimum retention period. A liability for such one-time termination benefits shall be measured initially at the communication date based on the fair value of the liability as of the termination date and recognized ratably over the future service period.

The charges that the Company expects to incur in connection with the restructuring are subject to a number of assumptions, and actual results may differ materially. The Company may also incur additional costs not currently contemplated due to events that may occur as a result of, or that are associated with, the restructuring plan.

Segment reporting

Segment reportingThe Company operates in one segment, the research and development of de novo protein therapeutics using sophisticated computational algorithms and methods to address unmet medical needs. Our primary areas of focus are in oncology, inflammation, and autoimmunity. The Company’s operations and its assets are held in the United States.

Fair value of financial instruments

Fair value of financial instrumentsThe carrying amounts of certain of the Company’s financial instruments, including cash, cash equivalents, receivables, accounts payable and other liabilities, approximate their fair values because of their nature and/or short maturities.

Concentration of credit risk

Concentration of credit riskFinancial instruments, which potentially subject the Company to significant concentrations of credit risk, consist primarily of cash and cash equivalents. Cash and cash equivalents are invested in accordance with the Company’s investment policy. The primary objective for the Company’s investment portfolio is the preservation of capital and maintenance of liquidity and includes guidelines on the quality of financial instruments and defines allowable investments that the Company believes minimizes the exposure to concentration of credit risk.

Recently issued and recently adopted accounting standards

In December 2019, the FASB issued ASU 2019-12 “Simplifying the Accounting for Income Taxes.” The objective of the standard is to improve areas of GAAP by removing certain exceptions permitted by ASC Topic 740-- Income Taxes and clarifying existing guidance to facilitate consistent application. ASU 2019-12 is effective for fiscal years and interim periods beginning after December 15, 2020. The Company has incurred net losses since its inception and maintains a full valuation allowance on the net deferred tax assets. As such, the Company does not expect the adoption of this standard to have a material impact on the financial condition, results of operations and cash flows, or financial statement disclosures.

In August 2018, the FASB issued “ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” The objective of the standard is to align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The Company adopted this standard on January 1, 2020 on a prospective basis. The adoption of this ASU did not have a material impact on the Company’s financial condition, results of operations, cash flows, and financial statement disclosures.