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Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2022
Accounting Policies [Abstract] |
Significant Accounting Policies | 1. Significant Accounting Policies Description of Operations FibroGen, Inc. (“FibroGen” or the “Company”) is headquartered in San Francisco, California, with subsidiary offices in Beijing and Shanghai, People’s Republic of China (“China”). FibroGen is a leading biopharmaceutical company developing and commercializing a pipeline of first-in-class therapeutics. The Company applies its pioneering expertise in hypoxia-inducible factor (“HIF”) biology, 2-oxoglutarate enzymology, and connective tissue growth factor to advance innovative medicines for the treatment of anemia, fibrotic disease, and cancer. Pamrevlumab, a human monoclonal antibody targeting connective tissue growth factor, is in Phase 3 clinical development for the treatment of idiopathic pulmonary fibrosis, locally advanced unresectable pancreatic cancer and Duchenne muscular dystrophy. To date, the Company has retained exclusive worldwide rights for pamrevlumab. Roxadustat is an oral small molecule inhibitor of HIF prolyl hydroxylase activity. Roxadustat (爱瑞卓®, EVRENZO TM) is approved in China, Europe, Japan, and numerous other countries for the treatment of anemia in chronic kidney disease (“CKD”) for patients who are on dialysis and not on dialysis. Astellas Pharma Inc. (“Astellas”) and FibroGen are collaborating on the development and commercialization of roxadustat in territories including Japan, Europe, Turkey, Russia and the Commonwealth of Independent States, the Middle East, and South Africa. FibroGen and AstraZeneca AB (“AstraZeneca”) are collaborating on the development and commercialization of roxadustat in the United States (“U.S.”), China, other markets in the Americas, Australia/New Zealand, and Southeast Asia. Roxadustat is in Phase 3 clinical development for anemia associated with myelodysplastic syndromes. The Company has completed a Phase 2 study of roxadustat in chemotherapy-induced anemia and is running a Phase 3 trial of roxadustat in chemotherapy-induced anemia in China. The Company has a pipeline of late-stage clinical programs as well as preclinical drug candidates at various stages of development that include both small molecules and biologics. The Company has leveraged its internally developed 2-oxoglutarate and connective tissue growth factor biology expertise as well as in-licensing of additional programs, such as antibodies targeting Galectin-9 protein (“Gal-9”) and C-C Motif Chemokine Receptor 8 (“CCR8”), to further enhance its late-stage preclinical pipeline. FibroGen’s goal is to build a diversified pipeline with novel drugs that will address unmet patient needs in oncology, immunology, and fibrosis. Basis of Presentation and Principles of Consolidation The condensed consolidated financial statements include the accounts of FibroGen, its wholly-owned subsidiaries and its majority-owned subsidiaries, FibroGen Europe Oy and FibroGen China Anemia Holdings, Ltd. All inter-company transactions and balances have been eliminated in consolidation. For the variable interest entity (“VIE”) for which FibroGen is not the primary beneficiary, the Company uses the equity method of accounting. The Company operates as one reportable segment — the discovery, development and commercialization of novel therapeutics to treat serious unmet medical needs. The unaudited condensed consolidated financial statements and related disclosures have been prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) applicable to interim financial reporting and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the U.S. Securities and Exchange Commission (“SEC”) and, therefore, do not include all information and footnote disclosures normally included in the annual consolidated financial statements. The financial information included herein should be read in conjunction with the consolidated financial statements and related notes in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, filed on February 28, 2022 and as amended on March 4, 2022 (“2021 Form 10-K”). Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no impact on previously reported financial position, results of operations, or cash flows. Use of Estimates The preparation of the condensed 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 disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions include valuation and recognition of revenue and deferred revenue, specifically, estimates in variable consideration for drug product sales, and estimates in transaction price per unit for the China manufacturing and supply obligation. On an ongoing basis, management reviews these estimates and assumptions. Changes in facts and circumstances may alter such estimates and actual results could differ from those estimates. In the Company’s opinion, the accompanying unaudited condensed consolidated financial statements include all normal recurring adjustments necessary for a fair statement of its financial position, results of operations and cash flows for the interim periods presented. Significant Accounting Policies The accounting policies used by the Company in its presentation of interim financial results are consistent with those presented in Note 2 to the consolidated financial statements included in the 2021 Form 10-K, except for the updates to the following: Stock-Based Compensation The Company maintains equity incentive plans under which equity awards are granted to employees, which are comprised of stock options, service-based restricted stock units (“RSUs”), performance-based RSUs, and total shareholder return (“TSR”) awards. The Company measures and recognizes compensation expense for all stock options, service and performance-based restricted stock units granted to its employees and directors based on the estimated fair value of the award on the grant date. The Company uses the Black-Scholes valuation model to estimate the fair value of stock option awards. The determination of the grant date fair value of options using the Black-Scholes valuation model is affected by the Company’s estimated common stock fair value and requires management to make a number of assumptions including the expected life of the option, the volatility of the underlying stock, the risk-free interest rate and expected dividends. To estimate the fair value of the TSR awards, the Company uses the Monte Carlo valuation model to simulate the probabilities of achievement, which requires management to make a number of assumptions including 30-day average price, volatility of the underlying stock and the Company's peers, and the risk-free interest rate. The compensation cost of service-based stock options and restricted stock units is recognized net of any estimated forfeitures on a straight-line basis over the employee requisite service period. Compensation cost for performance-based RSUs is expensed over the respective vesting periods when the achievement of performance criteria is probable. Compensation cost for the TSR awards is recognized over the requisite service period, regardless of when, if ever, the market condition is satisfied. The Company believes that the fair value of stock options granted to non-employees is more reliably measured than the fair value of the services received. Net Loss per Share The following is a reconciliation of the basic and diluted net income (loss) per share calculation for the periods presented (in thousands, except per share data):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Net income (loss) |  | $ | (91,650 | ) |  | $ | 49,798 |  |  | $ | (227,479 | ) |  | $ | (155,945 | )
Weighted average shares used to compute net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 93,767 |  |  |  | 92,644 |  |  |  | 93,431 |  |  |  | 92,206 |
Dilutive effect of potential common shares |  |  | — |  |  |  | 164 |  |  |  | — |  |  |  | — |
Diluted |  |  | 93,767 |  |  |  | 92,808 |  |  |  | 93,431 |  |  |  | 92,206 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.98 | ) |  | $ | 0.54 |  |  | $ | (2.43 | ) |  | $ | (1.69 | )
Diluted |  | $ | (0.98 | ) |  | $ | 0.54 |  |  | $ | (2.43 | ) |  | $ | (1.69 | )
Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive and as such, these shares are not included in the calculation of diluted earnings per share. The Company reported a net loss for the three months ended September 30, 2022, and nine months ended September 30, 2022 and 2021. Therefore, dilutive common shares are not assumed to have been issued since their effect is anti-dilutive for these periods. Diluted weighted average shares excluded the following potential common shares related to s tock options, RSUs (including service-based RSUs, performance-based RSUs and TSR awards) and shares to be purchased under the 2014 Employee Stock Purchase Plan (“ESPP”) for the periods presented as they were anti-dilutive (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |  |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |  |
Employee stock options |  |  | 9,715 |  |  |  | 10,301 |  |  |  | 9,794 |  |  |  | 7,860 |  |
RSUs |  |  | 1,978 |  |  |  | 1,911 |  |  |  | 2,066 |  |  |  | 1,509 |  |
ESPP |  |  | 50 |  |  |  | 321 |  |  |  | 390 |  |  |  | 357 |  |
|  |  | 11,743 |  |  |  | 12,533 |  |  |  | 12,250 |  |  |  | 9,726 |  |
Risks and Uncertainties The Company’s future results of operations involve a number of risks and uncertainties. Factors that could affect the Company’s future operating results and cause actual results to vary materially from expectations include, but are not limited to, the results of clinical trials and the achievement of milestones, research developments, actions by regulatory authorities, market acceptance of the Company’s product candidates, competition from other products and larger companies, intellectual property protection for the Company's proprietary technology, strategic relationships, and dependence on key individuals, suppliers, clinical organization, and other third parties. Recently Issued Accounting Guidance Not Yet Adopted In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”), which provides companies with optional financial reporting alternatives to reduce the cost and complexity associated with the accounting for contracts and hedging relationships affected by reference rate reform. This guidance is effective as of March 12, 2020 through December 31, 2022. Subsequently in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which clarifies ASU 2020-04 and provides certain optional expedients that allow derivative instruments impacted by changes in the interest rate used for margining, discounting or contract price alignment to qualify for certain optional relief. ASU 2021-01 is effective in the same timeframe as ASU2020-04. The relief offered by this guidance, if adopted, is available to companies for the period March 12, 2020 through December 31, 2022. The Company did not elect to apply any of the expedients or exceptions as of and for the three and nine months ended September 30, 2022. The Company has certain lease arrangements that were accounted for with reference to the London Inter-Bank Offered Rate (“LIBOR”). The Company has evaluated the options for transitioning away from LIBOR for these arrangements and does not expect a material impact on its condensed consolidated financial statements and related disclosures upon adoption of this guidance.

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- Definition The entire disclosure for all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126899994&loc=d3e18726-107790 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI https://asc.fasb.org/topic&trid=2122369 + Details
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