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Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Use of Estimates	a) Use of Estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses in the reporting period. The Company regularly evaluates estimates and assumptions related to accounting for research and development costs, valuation and recoverability of deferred tax assets, asset impairment, stock-based compensation and loss contingencies. The Company bases its estimates and assumptions on current facts, historical experience and various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the accrual of costs and expenses that are not readily apparent from other sources. The actual results experienced by the Company may differ materially and adversely from the Company’s estimates. To the extent there are material differences between the estimate s and the actual results, future results of operations will be affected.
Principles of Consolidation	b) Principles of Consolidation These consolidated financial statements include the accounts of Anavex Life Sciences Corp. and its wholly-owned subsidiaries, Anavex Australia Pty Limited, a company incorporated under the laws of Australia, Anavex Germany GmbH, a company incorporated under the laws of Germany, and Anavex Canada Ltd., a company incorporated under the laws of the Province of Ontario, Canada. All inter-company transactions and balances have been eliminated.
Cash and equivalents	c) Cash and equivalents The Company considers only those investments which are highly liquid, readily convertible to cash and that mature within three months from the date of purchase to be cash equivalents.
Research and Development Expenses	d) Research and Development Expenses Research and development costs are expensed as incurred. These expenses are comprised of the costs of the Company’s proprietary research and development efforts, including preclinical studies, clinical trials, manufacturing costs, employee salaries and benefits and stock based compensation expense, contract services including external research and development expenses incurred under arrangements with third parties such as contract research organizations (“CROs”), facilities costs, overhead costs and other related expenses. Milestone payments made by the Company to third parties are expensed when the specific milestone has been achieved. Manufacturing costs are expensed as incurred in accordance with Accounting Standard Codification (“ASC”) 730, Research and Development, as these materials have no alternative future use outside of their intended use. Nonrefundable advance payments for goods or services that will be used or rendered for future research and development activities are deferred and amortized over the period that the goods are delivered, or the related services are performed, subject to an assessment of recoverability. The Company makes estimates of costs incurred in relation to external CROs, and clinical site costs. The Company analyzes the progress of clinical trials, including levels of patient enrollment, invoices received and contracted costs when evaluating the adequacy of the amount expensed and the related prepaid asset and accrued liability. Significant judgments and estimates must be made and used in determining the accrued balance and expense in any accounting period. The Company reviews and accrues CRO expenses and clinical trial study expenses based on work performed and relies upon estimates of those costs applicable to the stage of completion of a study. Accrued CRO costs are subject to revisions as such trials progress to completion. Revisions are charged to expense in the period in which the facts that give rise to the revision become known. With respect to clinical site costs, the financial terms of these agreements are subject to negotiation and vary from contract to contract. Payments under these contracts may be uneven and depend on factors such as the achievement of certain events, the successful recruitment of patients, the completion of portions of the clinical trial or similar conditions. The objective of our policy is to match the recording of expenses in our financial statements to the actual services received and efforts expended. As such, expense accruals related to clinical site costs are recognized based on our estimate of the degree of completion of the event or events specified in the specific clinical study or trial contract. In addition, the Company incurs expenses in respect of the acquisition of intellectual property relating to patents and trademarks. The probability of success and length of time to develop commercial applications of the drugs subject to the acquired patents and trademarks is difficult to determine and numerous risks and uncertainties exist with respect to the timely completion of the development projects. There is no assurance the acquired patents and trademarks will ever be successfully commercialized. Due to these risks and uncertainties, the acquisition of patents and trademarks does not meet the definition of an asset and thus are expensed as incurred within general and administrative expenses.
Research and Development Incentive Income	e) Research and Development Incentive Income The Company is eligible to obtain certain research and development tax credits, including the New York City Biotechnology Tax Credit (“NYC Biotech credit”), and the Australian research and development tax incentive credit (the “Australia R&D credit”) through a program administered through the Australian Tax Office (the “ATO”), which provides for a cash refund based on a percentage of certain research and development activities undertaken in Australia by the Company’s wholly owned subsidiary, Anavex Australia Pty Ltd. (“Anavex Australia”). The cash refund is available to eligible companies with annual aggregate revenue of less than $20.0 million (Australian) during the reimbursable period. The tax incentives are available on the basis of specific criteria with which the Company must comply. Although the tax incentive may be administered through the local tax authority, the Company has accounted for the incentives outside of the scope of ASC Topic 740, Income Taxes, since the incentives are not linked to the Company’s taxable income and can be realized regardless of whether the Company has generated taxable income in the respective jurisdictions. With respect to the Australia R&D credit, Anavex Australia may be eligible to receive the cash refund for certain research and development expenses incurred by Anavex Australia outside of Australia, to the extent such expenses are pre-approved by the Australian authority pursuant to an advanced overseas finding application. The Company accrues for the amount of cash refund it expects to receive in relation to research and development expenses outside of Australia only to the extent it has received advanced approval from the Department of Industry, Innovation and Science in Australia, pursuant to an approved advanced overseas finding application. The Company recognizes the amount of cash refund it expects to receive related to the NYC Biotech credit and Australian research and development tax incentive program when there is reasonable assurance that the cash refund will be received, when the relevant expenditures have been incurred, and when the amount can be reliability measured. This amount is included in Incentive and tax receivables in the accompanying consolidated balance sheets. In addition, Anavex Australia incurs Goods and Services Tax (“GST”) on services provided by Australian vendors. As an Australian entity, Anavex Australia is entitled to a refund of the GST paid. The Company’s estimate of the amount of cash refund it expects to receive related to GST incurred is included in “Incentive and tax receivables” in the accompanying consolidated balance sheets.
Basic and Diluted Loss per Share	f) Basic and Diluted Loss per Share Basic loss per common share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted loss per common share is computed similar to basic loss per common share except that the denominator is increased to include the weighted average number of all potentially dilutive securities convertible into shares of common stock that were outstanding during the period. As of September 30, 2019, loss per share excludes 8,812,933 (2018 – 7,185,296) potentially dilutive common shares related to outstanding options and warrants, as their effect was anti-dilutive.
Financial Instruments	g) Financial Instruments The carrying value of the Company’s financial instruments, consisting of cash and equivalents, incentive and tax receivables, accounts payable and accrued liabilities approximate their fair value due to the short-term maturity of such instruments. Unless otherwise noted, it is management’s opinion that the Company is not exposed to significant interest, currency or credit risks arising from these financial instruments.
Foreign Currency Translation	h) Foreign Currency Translation The functional currency of the Company is the US dollar. Monetary items denominated in a foreign currency are translated into US dollars at exchange rates prevailing at the balance sheet date and non-monetary items are translated at exchange rates prevailing when the assets were acquired, or obligations incurred. Foreign currency denominated expense items are translated at exchange rates prevailing on the transaction date. Unrealized gains or losses arising from the translations are credited or charged to income in the period in which they occur. The Company has determined that the functional currency of Anavex Australia Pty Limited is the US dollar. The Company has determined that the functional currency of Anavex Germany GmbH is the US dollar. The functional currency of Anavex Canada Ltd. is the Canadian dollar.
Segment and Geographic Reporting	i) Segment and Geographic Reporting Operating segments are defined as components of an enterprise for which separate discrete information is available for evaluation by the chief operating decision maker or decision-making group, in deciding how to allocate resources and in assessing performance. The Company views its operations and manages its business as one operating segment, which is the business of developing novel therapies for the management of CNS diseases.
Grant Income	j) Grant Income Research and development incentive income is recognized when the research and development activities have been undertaken and the Company has completed its assessment of whether such activities meet the relevant qualifying criteria. The Company recognizes such income at the fair value of the grant when it is received, and all substantive conditions have been satisfied. Grants received from government and other agencies in advance of the specific research and development costs to which they relate are deferred and recognized in the consolidated statement of operations in the period they are earned and when the related research and development costs are incurred.
Income Taxes	k) Income Taxes The Company has adopted the provisions of Financial Accounting Standards Board (FASB) ASC 740, Income Taxes, (“ASC 740”) which requires the asset and liability method of accounting for income taxes. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The Company follows the provisions of ASC 740 regarding accounting for uncertainty in income taxes. The Company initially recognizes tax positions in the financial statements when it is more likely than not the position will be sustained upon examination by the tax authorities. Such tax positions are initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority assuming full knowledge of the position and all relevant facts. Application requires numerous estimates based on available information. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, and its recognized tax positions and tax benefits may not accurately anticipate actual outcomes. As additional information is obtained, there may be a need to periodically adjust the recognized tax positions and tax benefits. These periodic adjustments may have a material impact on the consolidated statements of operations.
Stock-based Compensation	l) Stock-based Compensation The Company accounts for all stock-based payments and awards under the fair value method. Stock-based payments to non-employees are measured at the fair value of the consideration received, or the fair value of the equity instruments issued, or liabilities incurred, whichever is more reliably measurable. The fair value of stock-based payments to non-employees is periodically re-measured until the counterparty performance is complete, and any change therein is recognized over the vesting period of the award and in the same manner as if the Company had paid cash instead of paying with or using equity based instruments. Compensation costs for stock-based payments with graded vesting are recognized on a straight-line basis. The cost of stock-based payments to non-employees that are fully vested and non-forfeitable at the grant date are measured and recognized at that date, unless there is a contractual term for services in which case such compensation would be amortized over the contractual term. The Company accounts for the granting of share purchase options to employees using the fair value method whereby all awards to employees will be recorded at fair value on the date of the grant. The fair value of all share purchase options are expensed over their contractual vesting period, or over the expected performance period for only the portion of awards expected to vest, in the case of milestone-based vesting, with a corresponding increase to additional paid-in capital. The Company uses the Black-Scholes option valuation model to calculate the fair value of share purchase options at the date of the grant. Option pricing models require the input of highly subjective assumptions, including the expected price volatility. Changes in these assumptions can materially affect the fair value estimates.
Fair Value Measurements	m) Fair Value Measurements Fair value is defined as 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 at the measurement date. Assets and liabilities that are measured at fair value are reported using a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date; Level 2 - observable inputs other than Level 1, quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, and model-derived prices whose inputs are observable or whose significant value drivers are observable; and Level 3 - assets and liabilities whose significant value drivers are unobservable by little or no market activity and that are significant to the fair value of the assets or liabilities. The book value of cash and cash equivalents and accounts payable and accrued liabilities approximate their fair values due to the short-term maturity of those instruments. At September 30, 2019 and 2018, the Company did not have any Level 3 assets or liabilities.
Recent Accounting Pronouncements	n) Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements In May 2014, the FASB and the International Accounting Standards Board (IASB) issued a converged standard on revenue recognition from contracts with customers, ASU 2014-09 (Topic 606 and IFRS 15). This standard superseded nearly all existing revenue recognition guidance. ASU 2014-09 is effective for the Company on a prospective basis beginning on October 1, 2018. The adoption of this standard did not have a material impact for any period presented. In May 2017, the FASB issued ASU No. 2017-09, “Compensation–Stock Compensation (Topic 718): Scope of Modification Accounting,” clarifying when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. The new guidance requires modification accounting if the fair value, vesting condition or the classification of the award is not the same immediately before and after a change to the terms and conditions of the award. The new guidance was effective for the Company on a prospective basis beginning on October 1, 2018. The adoption of this standard did not have a material impact for any period presented. Recent Accounting Pronouncements Not Yet Adopted In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases. The guidance would require lessees to recognize most leases on their balance sheets as lease liabilities with corresponding right-of-use assets. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2018. The new guidance is effective for the Company on a prospective basis beginning on October 1, 2019. The adoption of this guidance is not expected to have a material impact for any period presented. In June 2018, the FASB issued ASU No. 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting, to simplify the accounting for share-based payments to nonemployees by aligning it with the accounting for share-based payments to employees, with certain exceptions. The new guidance is effective for the Company beginning on October 1, 2019. The new guidance is required to be applied retrospectively with the cumulative effect recognized at the date of initial application. The Company is currently evaluating the impact this guidance will have on its financial condition, results of operations and cash flows. Other than noted above, the Company does not expect the adoption of recently issued accounting pronouncements to have a significant impact on its results of operations, financial position or cash flow.

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