| Summary of Significant Accounting Policies | Summary of Significant Accounting Policies (A) Basis of Presentation: The Company’s fiscal year ends on March 31, and its fiscal quarters end on June 30, September 30 and December 31. These unaudited condensed consolidated financial statements and accompanying notes have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. These unaudited condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2020 (the "Annual Report"), filed with the SEC on June 10, 2020. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary to present fairly the financial position of the Company and its results of operations and cash flows for the periods presented have been included. Operating results for the three and six-months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the year ending March 31, 2021, for any other interim period, or for any other future year. Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification ("ASC"), and as amended by Accounting Standards Updates ("ASU"), issued by the Financial Accounting Standards Board ("FASB"). These unaudited condensed consolidated financial statements and accompanying notes include the accounts of the Company and its wholly owned subsidiaries. The Company has no unconsolidated subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Certain prior period balances have been reclassified to conform to the current period presentation. These unaudited condensed consolidated financial statements and accompanying notes have been prepared on the basis that the Company will continue as a going concern, and do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern (see Note 2(B)). On November 12, 2020, Sio completed the Domestication to change its jurisdiction of incorporation from Bermuda to the State of Delaware in the United States and became the parent company of AHL and ATH, as well as the grandparent company of ASI, ASG, ASA, ATI and ASEU (see Notes 1 and 12). The historical financial statements of AGT became the historical financial statements of Sio upon consummation of the Domestication. As a result, these unaudited condensed consolidated financial statements and accompanying notes reflect (i) the historical operating results of AGT and its subsidiaries prior to the Domestication; and (ii) the Company’s equity structure for all periods presented. A 1-for-8 reverse stock split of the Company's outstanding common stock was effected in May 2019 as approved by the Company's Board of Directors and a majority of its shareholders, which reduced the number of shares issued and outstanding from approximately 182.2 million to 22.8 million as of March 31, 2019. As such, all references to share and per share amounts in these unaudited condensed consolidated financial statements and accompanying notes have been retroactively restated to reflect the 1-for-8 reverse stock split, except for the authorized number of shares of the Company's common stock and the par value per share, which were not affected. There have been no significant changes in the Company’s accounting policies from those disclosed in its Annual Report. (B) Going Concern and Management's Plans: The Company assesses and determines its ability to continue as a going concern in accordance with the provisions of ASC Subtopic 205-40, " Presentation of Financial Statements—Going Concern " ("ASC Subtopic 205-40"), which requires the Company to evaluate whether there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that its annual and interim consolidated financial statements are issued. Certain additional financial statement disclosures are required if such conditions or events are identified. If and when an entity’s liquidation becomes imminent, financial statements should be prepared under the liquidation basis of accounting. Determining the extent, if any, to which conditions or events raise substantial doubt about the Company’s ability to continue as a going concern, or the extent to which mitigating plans sufficiently alleviate any such substantial doubt, as well as whether or not liquidation is imminent, requires significant judgment by management. The Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the consolidated financial statements are issued. As of September 30, 2020, the Company’s cash and cash equivalents totaled $63.2 million and its accumulated deficit was $777.2 million. For the six months ended September 30, 2020 and the fiscal year ended March 31, 2020, the Company incurred net losses of $18.6 million and $72.6 million, respectively. The Company expects to continue to incur significant operating and net losses, as well as negative cash flows from operations, for the foreseeable future as it continues to develop its gene therapy product candidates and prepares for potential future regulatory approvals and commercialization of its products, if approved. The Company has not generated any revenue to date and does not expect to generate product revenue unless and until it successfully completes development and obtains regulatory approval for at least one of its product candidates, and its current cash and cash equivalents balance will not be sufficient to complete all necessary development activities and commercially launch its products. The Company anticipates that its current cash and cash equivalents balance will be sufficient to sustain operations into the fourth calendar quarter of 2021, which raises substantial doubt about the Company's ability to continue as a going concern. To continue as a going concern, the Company will need, among other things, to raise additional capital. The Company continually assesses multiple options to obtain additional funding to support its operations, including proceeds from offerings of the Company’s equity securities or debt, cash received from the exercise of outstanding common stock options, or transactions involving product development, technology licensing or collaboration arrangements, or other sources of capital to complete its currently planned development programs. Management can provide no assurances that it can raise a sufficient amount of financing for the Company on favorable terms, if at all. Although the Company has successfully obtained financing in the past, and management believes that it will continue to do so in the future, ASC Subtopic 205-40 does not permit future financing activities that are not probable of being implemented and probable of alleviating the conditions that raise substantial doubt to be included in the Company's assessment of its liquidity. Due to these uncertainties, there is substantial doubt about the Company’s ability to continue as going concern. These unaudited condensed consolidated financial statements and accompanying notes have been prepared on the basis that the Company will continue as a going concern, and do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern. (C) Use of Estimates: The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. The Company regularly evaluates estimates and assumptions related to certain assets, including which costs are charged to research and development and general and administrative expense, as well as assumptions used to estimate its ability to continue as a going concern and estimate the fair value of its stock option awards. Specifically, the Company estimates the grant date fair value of stock option awards with only time-based vesting requirements using a Black-Scholes valuation model and uses a Monte Carlo Simulation method under the income approach to estimate the grant date fair value of stock option awards with market-based performance conditions. The Company bases its estimates and assumptions on historical experience and on 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 that are not readily apparent from other sources. Actual results could differ from those estimates. Additionally, the Company assessed the impact that the COVID-19 pandemic has had on its operations and financial results as of September 30, 2020 and through the date of issuance of these unaudited condensed consolidated financial statements. The Company’s analysis was informed by the facts and circumstances as they were known to the Company. This assessment considered the impact COVID-19 may have on financial estimates and assumptions that affect the reported amounts of assets and liabilities and expenses. (D) Net Loss per Common Share: Basic net loss per common share is computed by dividing the net loss applicable to common stockholders by the weighted-average number of common shares and 3,301,998 pre-funded warrants (see Note 9(B)) outstanding during the period, without further consideration for potentially dilutive securities. In accordance with ASC Topic 260, Earnings Per Share , the pre-funded warrants are included in the computation of basic net loss per share because the exercise price is negligible and they are fully vested and exercisable at any time after the original issuance date. Diluted net loss per common share is computed by dividing the net loss applicable to common stockholders by the diluted weighted-average number of common shares outstanding during the period calculated in accordance with the treasury stock method. In periods in which the Company reports a net loss, all common share equivalents are deemed anti-dilutive such that basic net loss per common share and diluted net loss per common share are equivalent. Potentially dilutive common shares have been excluded from the diluted net loss per common share computations in all periods presented because such securities have an anti-dilutive effect on net loss per common share due to the Company’s net loss. There are no reconciling items used to calculate the weighted-average number of total common shares outstanding for basic and diluted net loss per common share data. Restricted Stock Units ("RSUs") and stock options outstanding for approximately 0.9 million and 2.2 million common shares, respectively, were not included in the calculation of diluted weighted-average common shares outstanding for the three and six-months ended September 30, 2020 because they were anti-dilutive given the net loss of the Company. RSUs and stock options outstanding for approximately 0.3 million and 2.7 million common shares, respectively, were not included in the calculation of diluted weighted-average common shares outstanding for the three and six-months ended September 30, 2019 because they were anti-dilutive given the net loss of the Company. (E) Financial Instruments and Fair Value Measurement: The Company utilizes fair value measurement guidance prescribed by accounting standards to value its financial instruments. The guidance establishes a fair value hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value is defined as the exchange price, or exit price, representing the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As a basis for considering market participant assumptions in fair value measurements, the guidance establishes a three-tier fair value hierarchy that distinguishes among the following: • Level 1-Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. • Level 2-Valuations are based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and models for which all significant inputs are observable, either directly or indirectly. • Level 3-Valuations are based on inputs that are unobservable (supported by little or no market activity) and significant to the overall fair value measurement. To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The Company’s financial instruments include cash and cash equivalents, a long-term investment and accounts payable. Cash consists of non-interest-bearing deposits denominated in the U.S. dollar and Swiss franc, while cash equivalents consists of interest-bearing money market fund deposits denominated in the U.S. dollar, which are invested in debt securities issued or guaranteed by the U.S. government and repurchase agreements fully collateralized by U.S. Treasury and U.S. government securities. Cash and accounts payable are stated at their respective historical carrying amounts, which approximate fair value due to their short-term nature. The carrying value of the Company's money market fund included in cash and cash equivalents of $40.5 million at September 30, 2020 approximated fair value, which is based on quoted prices in active markets for identical securities. At September 30, 2020, the Company held a long-term investment in nonredeemable convertible preferred stock, which is accounted for in accordance with the provisions of ASC 321, " Investments - Equity Securities " whereby the Company elected to use the measurement alternative therein (see Note 4). The following table summarizes the fair value of the Company's money market fund included in cash equivalents based on the inputs used at September 30, 2020 in determining such values (in thousands): Fair Value Price Quotations (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Money market fund $ 40,450 $ 40,450 $ — $ — (F) Recent Accounting Pronouncements: In February 2016, the FASB issued Topic 842, which requires lessees to recognize on their consolidated balance sheets a liability to make lease payments and a right-of-use asset representing their right to use the underlying asset for the lease term for both finance and operating leases with lease terms greater than twelve months. Topic 842 is effective for annual periods beginning after December 15, 2018, and interim periods within fiscal years beginning after December 15, 2018. Early adoption is permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. Topic 842 allows entities to choose to use either (i) the effective date or (ii) the beginning of the earliest comparative period presented in the financial statements as the date of initial application. Topic 842 provides a number of optional practical expedients in transition. The Company adopted Topic 842 on April 1, 2019 using the optional modified retrospective transition method. Comparative periods were not restated. For leases that commenced prior to April 1, 2019, the Company elected the following package of practical expedients when assessing the transition impact: (1) not to reassess whether any expired or existing contracts are or contain leases; (2) not to reassess the lease classification for any expired or existing leases; and (3) not to reassess initial direct costs for any existing leases. The Company also elected to: (1) use the total lease term in its initial incremental borrowing rate calculation; (2) combine its lease and non-lease components and account for them as a single lease component; and (3) not apply the use of hindsight in determining the lease term when considering lessee options to extend or terminate the lease and to purchase the underlying asset. Upon adoption, the Company recorded corresponding aggregate operating lease right-of-use assets and operating lease liabilities of $3.0 million and $2.4 million, respectively, including $0.6 million of prepaid rent previously classified within other non-current assets in the Company’s consolidated balance sheet that was reclassified to operating lease right-of-use assets. The adoption of the new standard did not materially impact the Company’s consolidated results of operations and cash flows and did not have an impact on the Company’s beginning accumulated deficit balance. For additional information regarding the Company’s leases, see Note 5 for further information regarding the impact of the Company's adoption of Topic 842. In December 2019, the FASB issued ASU No. 2019-12, " Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes " ("ASU No. 2019-12"). ASU No. 2019-12 simplifies the accounting for income taxes, eliminates certain exceptions within Income Taxes (Topic 740), and clarifies certain aspects of the current guidance to promote consistency among reporting entities, and is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. Most amendments within ASU No. 2019-12 are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The Company early adopted the provisions of ASU No. 2019-12 on April 1, 2020, which did not have a material impact on its consolidated financial statements and related disclosures. In January 2020, the FASB issued ASU No. 2020-01, " Investments — Equity Securities: Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 " ("ASU No. 2020-01"). ASU No. 2020-01 clarifies that an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in accordance with ASC 321, " Investments — Equity Securities " immediately before applying or upon discontinuing the equity method of accounting in ASC 323, " Investments—Equity Method and Joint Ventures ." The provisions of ASU No. 2020-01 are effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years with early adoption permitted, including early adoption in an interim period for public business entities for periods for which financial statements have not yet been issued. While the Company does not expect the adoption of ASU No. 2020-01 to materially impact the Company's consolidated financial statements and related disclosures because it does not currently account for any investments pursuant to the equity method of accounting in accordance with ASC 323, " Investments—Equity Method and Joint Ventures ", the impact on the Company's consolidated financial statements and disclosures will depend on the facts and circumstances of any specific future transactions. In August 2020, the FASB issued ASU No. 2020-06, " Debt — Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging — Contracts in Entity's Own Equity (Subtopic 815-40) " ("ASU No. 2020-06") . ASU No. 2020-06 simplifies the accounting for convertible debt instruments by removing the beneficial conversion and cash conversion separation models for convertible instruments. Under ASU No. 2020-06, the embedded conversion features are no longer separated from the host contract for convertible instruments with conversion features that are not required to be accounted for as derivatives or that do not result in substantial premiums accounted for as paid-in capital. ASU No. 2020-06 also amends the accounting for certain contracts in an entity’s own equity that are currently accounted for as derivatives because of specific settlement provisions. In addition, the new guidance modifies how particular convertible instruments and certain contracts that may be settled in cash or shares impact the computation of diluted earnings or loss per share. The provisions of ASU No. 2020-06 are effective for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years, with early adoption permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. While the Company does not expect the adoption of ASU No. 2020-06 to materially impact the Company's consolidated financial statements and related disclosures because it does not currently maintain any debt instruments accounted for in accordance with ASC Subtopic 470-20, " Debt — Debt with Conversion and Other Options " or instruments accounted for as derivatives in accordance with ASC Subtopic 815-40, " Derivatives and Hedging — Contracts in Entity's Own Equity ", and the Company also currently includes outstanding pre-funded warrants in the computation of basic net loss per share (see Note 2(D)), the impact on the Company's consolidated financial statements and disclosures will depend on the facts and circumstances of any specific future transactions. Other recent accounting pronouncements issued by the FASB (including its Emerging Issues Task Force), the American Institute of Certified Public Accountants, and the SEC did not, or are not believed by management to, have a material impact on the Company’s present or future consolidated financial position, results of operations or cash flows. |
