Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates. Concentration of Credit Risk The Company invests in a variety of financial instruments and, by its policy, limits the amount of credit exposure with any one issuer, industry or geographic area. Accounts receivable are typically unsecured and are concentrated in the pharmaceutical industry and government sector. Accordingly, the Company may be exposed to credit risk generally associated with pharmaceutical companies and government funded entities. The Company has not historically experienced any significant losses due to concentration of credit risk. Accounts receivable consists of the following (in thousands): March 31, December 31, Vifor (1) $ 1,698 $ 51,090 (1) Accounts receivable at March 31, 2018 and December 31, 2017 included $1.6 million and $1.1 million, respectively, of unbilled receivables related to development costs to be reimbursed by Vifor (International) Ltd., and/or its affiliates (collectively, Vifor) under the agreement relating to CCX140, which we refer to as the CCX140 Agreement. As of December 31, 2017, accounts receivable excluded the $10.0 million cash commitment received from Vifor in February 2018 in connection with the agreement that harmonized the geographic commercialization rights underlying the agreements for both avacopan and CCX140 drug candidates, which we refer to as the Avacopan Amendment. See “Note 8. Collaboration and License Agreements” for a detailed discussion. Net Loss Per Share Basic net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share is computed by dividing net loss attributable to common stockholders by the sum of the weighted-average number of common shares outstanding and dilutive common stock equivalent shares outstanding for the period. The Company’s potentially dilutive common stock equivalent shares, which include incremental common shares issuable upon (i) the exercise of outstanding stock options and warrants, (ii) vesting of restricted stock units (RSUs) and restricted stock awards (RSAs), and (iii) the purchase from contributions to the 2012 Employee Stock Purchase Plan (the ESPP), (calculated based on the treasury stock method), are only included in the calculation of diluted net loss per share when their effect is dilutive. For the three months ended March 31, 2018 and 2017, the following potentially dilutive securities were excluded from the calculation of diluted net loss per share due to their anti-dilutive effect: Three Months Ended March 31, 2018 2017 Options to purchase common stock, including purchases from contributions to ESPP 11,824,877 10,646,551 Restricted stock units 459,682 565,345 Restricted stock awards 85,431 31,306 Warrants to purchase common stock 150,000 150,000 12,519,990 11,393,202 Comprehensive Loss Comprehensive loss comprises net loss and other comprehensive loss. For the periods presented other comprehensive loss consists of unrealized losses on the Company’s available-for-sale Revenue Recognition Effective January 1, 2018, the Company adopted Accounting Standards Codification (ASC) Topic 606, Revenue from Contracts with Customers The Company enters into corporate collaborations under which it may obtain upfront license fees, research and development funding and development and regulatory and commercial milestone payments and royalty payments. The Company’s performance obligations under these arrangements may include licenses of intellectual property, distribution rights, research and development services, delivery of manufactured product, and/or participation on joint steering committees. Licenses of intellectual property: If the license to the Company’s intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, the Company recognizes revenue from upfront license fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license. For licenses that are bundled with other promises, the Company utilizes judgement to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring proportional performance for purposes of recognizing revenue from non-refundable, up-front Milestone payments: At the inception of each arrangement that includes development, regulatory or commercial milestone payments, the Company evaluates whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price. ASC 606 suggests two alternatives to use when estimating the amount of variable consideration: the expected value method and the most likely amount method. Under the expected value method, an entity considers the sum of probability-weighted amounts in a range of possible consideration amounts. Under the most likely amount method, an entity considers the single most likely amount in a range of possible consideration amounts. Whichever method is used, it should be consistently applied throughout the life of the contract; however, it is not necessary for the Company to use the same approach for all contracts. The Company expects to use the most likely amount method for development and regulatory milestone payments. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the Company’s or the licensee’s control, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. The transaction price is then allocated to each performance obligation on a relative stand-alone selling price basis. The Company recognizes revenue as or when the performance obligations under the contract are satisfied. At the end of each subsequent reporting period, the Company re-evaluates catch-up Commercial milestones and royalties: For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and in which the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue when the related sales occur. To date, the Company has not recognized any royalty revenue resulting from its collaboration arrangements. Up-front Upon adoption of ASC 606 under the modified retrospective transition method, the Company recognized the cumulative effect of initially applying the new revenue standard of $47.3 million as an adjustment to the opening balance of accumulated deficit and an increase in deferred revenue. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Before the adoption of ASC 606, the Company recognized upfront fees straight-line under ASC 605 over the estimated performance period and recognized milestones when earned under the milestone method of accounting. See “Note 2. Summary of Significant Accounting Policies – Revenue Recognition” in the Company’s Annual Report on Form 10-K The impact of adoption on the Company’s consolidated statement of operations and balance sheet was as follows (in thousands): For the Three Months Ended March 31, 2018 As Balances Without Effect of Statement of Operations Collaboration and license revenue $ 9,546 $ 4,364 $ 5,182 Loss from operations (9,856 ) (15,038 ) 5,182 Net loss (9,417 ) (14,599 ) 5,182 March 31, 2018 As Balances Without Effect of Balance Sheet Liabilities: Deferred revenue $ 68,997 $ 15,023 $ 53,974 Noncurrent deferred revenue 74,554 86,379 (11,825 ) Stockholders’ equity: Accumulated deficit (345,948 ) (303,799 ) (42,149 ) Recent Accounting Pronouncements On December 22, 2017, the Tax Cuts and Jobs Act (“the Act”) was enacted into law. Accounting Standards Codification (ASC) 740, Income Taxes, requires companies to recognize the effect of the tax law changes in the period of enactment. Shortly after the enactment of the Act, the SEC staff issued Staff Accounting Bulletin No. 118 (SAB 118) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. The Company has adjusted its deferred tax assets and liabilities based on the reduction of the U.S. federal corporate tax rate from 34% to 21% and assessed the realizability of its deferred tax assets based on its current understanding of the provisions of the new law. The Company considers its accounting for the impacts of the new law to be provisional and the Company will continue to assess the impact of the recently enacted tax law (and expected further guidance from federal and state tax authorities as well as further guidance for the associated income tax accounting) on its business and consolidated financial statements for the remainder of 2018. No adjustments were made to the provisional estimate during the three months ended March 31, 2018. In February 2016, the Financial Accounting Standard Board issued Accounting Standards Update No. 2016-12, The Company has reviewed other recent accounting pronouncements and concluded they are either not applicable to the business or that no material effect is expected on the consolidated financial statements as a result of future adoption. |