Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements of Intra-Cellular Therapies, Inc. and its wholly own subsidiaries have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative United States generally accepted accounting principles set forth in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”). All intercompany accounts and transactions have been eliminated in consolidation. The Company currently operates in one operating segment. Operating segments are defined as components of an enterprise about which separate discrete information is available for the chief operating decision maker, or decision making group, in deciding how to allocate resources and assessing performance. The Company views its operations and manages its business in one segment, which is discovering and developing drugs for the treatment of neurological and psychiatric disorders. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Although actual results could differ from those estimates, management does not believe that such differences would be material. Cash and Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less from the date of purchase to be cash equivalents. Cash and cash equivalents consist of checking accounts, money market accounts, money market mutual funds, and certificates of deposit with a maturity date of three months or less. The carrying values of cash and cash equivalents approximate the fair market value. Certificates of deposit, commercial paper, corporate notes and corporate bonds with a maturity date of more than three months are classified separately on the balance sheet. Investment Securities Investment securities may consist of investments in U.S. Treasuries, various U.S. governmental agency debt securities, corporate bonds, certificates of deposit, and other fixed income securities with an average maturity of twelve months or less. Management classifies the Company’s investments as available-for-sale. available-for-sale Investment securities consisted of the following (in thousands): December 31, 2018 Amortized Unrealized Unrealized Estimated U.S. government agency securities $ 124,691 $ 24 $ (289 ) $ 124,426 FDIC certificates of deposit (1) 245 — — 245 Certificates of deposit 1,000 — — 1,000 Commercial paper 41,317 — (45 ) 41,272 Corporate notes/bonds 125,998 7 (365 ) 125,640 $ 293,251 $ 31 $ (699 ) $ 292,583 December 31, 2017 Amortized Unrealized Unrealized Estimated U.S. government agency securities $ 126,330 $ — $ (348 ) $ 125,982 FDIC certificates of deposit (1) 8,306 — — 8,306 Certificates of deposit 103,500 — — 103,500 Commercial paper 51,414 — (61 ) 51,353 Corporate notes/bonds 137,790 — (390 ) 137,400 $ 427,340 $ — $ (799 ) $ 426,541 (1) “FDIC Certificates of Deposit” consist of deposits that are $250,000 or less. The Company has classified all of its investment securities available-for-sale, available-for-sale The Company monitors its investment portfolio for impairment quarterly or more frequently if circumstances warrant. In the event that the carrying value of an investment exceeds its fair value and the decline in value is determined to be other-than-temporary, the Company records an impairment charge within earnings attributable to the estimated credit loss. In determining whether a decline in the value of an investment is other-than-temporary, the Company evaluates currently available factors that may include, among others: (1) general market conditions; (2) the duration and extent to which fair value has been less than the carrying value; (3) the investment issuer’s financial condition and business outlook; and (4) the Company’s assessment as to whether it is more likely than not that the Company will be required to sell a security prior to recovery of its amortized cost basis. As of December 31, 2018, the aggregate related fair value of investments with unrealized losses was $272.5 million and the aggregate amount of unrealized losses was $0.7 million. Of the $272.5 million, $180.4 million have been held in a continuous unrealized loss position for less than 12 months and $92.1 million have been held in a continuous loss position for 12 months or longer. The total continuous unrealized loss for investments held for 12 months or longer is approximately $345,000 as of December 31, 2018. As of December 31, 2017, the Company had approximately $37.3 million of investments with a continuous unrealized loss for 12 months or longer of approximately $42,000. The Company attributes the unrealized losses on the available-for-sale Fair Value Measurements The Company applies the fair value method under ASC Topic 820, Fair Value Measurements and Disclosures • Level 1—Fair value is determined by using unadjusted quoted prices that are available in active markets for identical assets and liabilities. • Level 2—Fair value is determined by using inputs other than Level 1 quoted prices that are directly or indirectly observable. Inputs can include quoted prices for similar assets and liabilities in active markets or quoted prices for identical assets and liabilities in inactive markets. Related inputs can also include those used in valuation or other pricing models, such as interest rates and yield curves that can be corroborated by observable market data. • Level 3—Fair value is determined by inputs that are unobservable and not corroborated by market data. Use of these inputs involves significant and subjective judgments to be made by a reporting entity—e.g., determining an appropriate adjustment to a discount factor for illiquidity associated with a given security. The Company evaluates financial assets and liabilities subject to fair value measurements on a recurring basis to determine the appropriate level at which to classify them each reporting period. This determination requires the Company to make subjective judgments as to the significance of inputs used in determining fair value and where such inputs lie within the ASC Topic 820 hierarchy. The Company has no assets or liabilities that were measured using quoted prices for significant unobservable inputs (Level 3 assets and liabilities) as of December 31, 2018 and December 31, 2017. The carrying value of cash held in money market funds of approximately $39.6 million as of December 31, 2018 and $26.2 million as of December 31, 2017 is included in cash and cash equivalents and approximates market value based on quoted market price or Level 1 inputs. The carrying value of cash held in certificates of deposit of approximately $7.5 million as of December 31, 2018 is included in cash and cash equivalents and approximates market value based on quoted market price or Level 1 inputs. The fair value measurements of the Company’s cash equivalents and available-for-sale Fair Value Measurements at December 31, Quoted Prices Significant Significant Money market funds $ 39,591 $ 39,591 $ — $ — U.S. government agency securities 124,426 — 124,426 — FDIC certificates of deposit 245 — 245 — Certificates of deposit 8,500 — 8,500 — Commercial paper 41,272 — 41,272 — Corporate bonds/notes 125,640 — 125,640 — $ 339,674 $ 39,591 $ 300,083 $ — Fair Value Measurements at Reporting Date Using December 31, Quoted Prices Significant Significant Money market funds $ 26,181 $ 26,181 $ — $ — U.S. government agency securities 125,982 — 125,982 — FDIC certificates of deposit 8,306 — 8,306 — Certificates of deposit 103,500 — 103,500 — Commercial paper 51,353 — 51,353 — Corporate bonds/notes 137,400 — 137,400 — $ 452,722 $ 26,181 $ 426,541 $ — Financial Instruments The Company considers the recorded costs of its financial assets and liabilities, which consist of cash equivalents, prepaid expenses, accounts payable and accrued liabilities, to approximate their fair value because of their relatively short maturities at December 31, 2018 and December 31, 2017. At December 31, 2018, the Company has approximately $2.4 million as a prepaid expense related to a regulatory filing fee that is expected to be refunded within the next year. Management believes that the risks associated with its financial instruments are minimal as the counterparties are various corporations, financial institutions and government agencies of high credit standing. Concentration of Credit Risk Cash equivalents are held with major financial institutions in the United States. Certificates of deposit, cash and cash equivalents held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and, therefore, bear minimal risk. Accounts Receivable Accounts receivable that management has the intent and ability to collect are reported in the balance sheets at outstanding amounts, less an allowance for doubtful accounts. The Company writes off uncollectible receivables when the likelihood of collection is not probable. The Company evaluates the collectability of accounts receivable on a regular basis. The allowance, if any, is based upon various factors including the financial condition and payment history of customers, an overall review of collections experience on other accounts and economic factors or events expected to affect future collections experience. No allowance was recorded as of December 31, 2018 and 2017, as the Company has a history of collecting on all its accounts including government agencies and collaborations funding its research and there were no balances in accounts receivable as of these dates. Property and Equipment Property and equipment is stated at cost and depreciated on a straight-line basis over estimated useful lives ranging from three to five years. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the assets or the term of the related lease. Expenditures for maintenance and repairs are charged to operations as incurred. When indicators of possible impairment are identified, the Company evaluates the recoverability of the carrying value of its long-lived assets based on the criteria established in ASC Topic No. 360, Property, Plant and Equipment Research and Development Except for payments made in advance of services, the Company expenses its research and development costs as incurred. For payments made in advance, the Company recognizes research and development expense as the services are rendered. Research and development costs primarily consist of salaries and related expenses for personnel and resources and the costs of clinical trials. Other research and development expenses include preclinical analytical testing, manufacturing of drug product, outside services, providers, materials and consulting fees. Costs for certain development activities, such as clinical trials, are recognized based on an evaluation of the progress to completion of specific tasks using data such as subject enrollment, clinical site activations or information provided to the Company by its vendors, among other factors with respect to 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 financial statements as prepaid or accrued research and development expense, as the case may be. As part of the process of preparing its financial statements, the Company is required to estimate its expenses resulting from its obligations under contracts with vendors, clinical research organizations and consultants and under clinical site agreements in connection with conducting clinical trials. The financial terms of these contracts are subject to negotiations, which vary from contract to contract and may result in payment flows that do not match the periods over which materials or services are provided under such contracts. The Company’s objective is to reflect the appropriate clinical trial expenses in its financial statements by matching those expenses with the period in which services are performed and efforts are expended. The Company accounts for these expenses according to the progress of the clinical trial as measured by subject progression and the timing of various aspects of the trial. The Company determines accrual estimates through financial models taking into account various clinical information provided by vendors and discussion with applicable personnel and external service providers as to the progress or state of consummation of trials, or the services completed. During the course of a clinical trial, the Company adjusts its clinical expense recognition if actual results differ from its estimates. The Company makes estimates of its accrued expenses as of each balance sheet date based on the facts and circumstances known to it at that time. The Company’s clinical trial accruals are dependent upon the timely and accurate reporting of contract research organizations, clinical sites and other third-party vendors. Although the Company does not expect its estimates to be materially different from amounts actually incurred, its understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and may result in it reporting amounts that are too high or too low for any particular period. For the years ended December 31, 2018 and 2017, there were no material adjustments to the Company’s prior period estimates of accrued expenses for clinical trials. Income Taxes Income taxes are accounted for using the liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement 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 year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount expected to be realized. Income tax expense is the tax payable for the period and the change during the period in deferred tax assets and liabilities. The Company accounts for uncertain tax positions pursuant to ASC Topic 740 (previously included in FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes—an Interpretation of FASB Statement No. 109 more-likely-than-not On December 22, 2017, President Trump signed into law the “Tax Cuts and Jobs Act” (“TCJA”) that significantly reforms the Internal Revenue Code of 1986, as amended (the “Code”). The TCJA, among other things, includes changes to U.S. federal tax rates, imposes significant additional limitations on the deductibility of interest and net operating loss carryforwards, allows for the expensing of capital expenditures, and puts into effect the migration from a “worldwide” system of taxation to a territorial system. In addition, the TCJA repealed the alternative minimum tax (“AMT”) and provides for a refund of taxes paid between 2018 and 2021. With the passing of the TCJA, the Company will receive a refund in future periods for AMT paid in prior years. The Company therefore has recognized a benefit of approximately $1.1 million for these taxes for the year ended December 31, 2017. During December 2017, 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 TCJA. The Company has recognized the provisional tax impacts related to the release of the valuation allowance with respect to AMT credits and the revaluation of deferred tax assets and liabilities and included these amounts in its consolidated financial statements for the year ended December 31, 2017. The Company completed its evaluation of the effects of the TCJA during the 4th quarter 2018 and the provisional amounts the Company accounted for in its December 31, 2017 provision were finalized in 2018 with no adjustments. The Company recorded income tax expense of $1,600, a benefit of $1.1 million, and a tax expense of $1,065,673 for the years ended December 31, 2018, 2017, and 2016, respectively. The Company’s effective tax rate for the years ended December 31, 2018 and 2017 was approximately 0% and 1.1% respectively. The Company’s annual effective tax rate of approximately 0% is substantially lower than the U.S. statutory rate of 21% due to valuation allowances recorded on current year losses where the Company is not more likely than not to recognize a future tax benefit. Comprehensive Income (Loss) All components of comprehensive income (loss), including net income (loss), are reported in the financial statements in the period in which they are incurred. Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner Share-Based Compensation Share-based payments are accounted for in accordance with the provisions of ASC Topic 718, Compensation—Stock Compensation For all awards granted with time-based vesting conditions, expense is amortized using the straight-line attribution method. Share-based compensation expense recognized in the statements of operations for the years ended December 31, 2018, 2017 and 2016 is based on share-based awards ultimately expected to vest. The Company utilizes the Black-Scholes Model for estimating fair value of its stock options granted. Option valuation models, including the Black-Scholes Model, require the input of subjective assumptions, and changes in the assumptions used can materially affect the grant date fair value of an award. These assumptions include the risk-free rate of interest, expected dividend yield, expected volatility and the expected life of the award. Expected volatility rates are based on a combination of the historical volatility of the common stock of comparable publicly traded entities and the limited historical information about the Company’s common stock. The expected life of stock options is the period of time for which the stock options are expected to be outstanding. Given the limited historical exercise data, the expected life is determined using the “simplified method,” which defines expected life as the midpoint between the vesting date and the end of the contractual term. The risk-free interest rates are based on the U.S. Treasury yield for a period consistent with the expected term of the option in effect at the time of the grant. The Company has not paid dividends to its stockholders since its inception and does not plan to pay cash dividends in the foreseeable future. Therefore, the Company has assumed an expected dividend rate of zero. For stock options granted, the exercise price was determined by using the closing market price of the Company’s common stock on the date of grant. A restricted stock unit (“RSU”) is a stock award that entitles the holder to receive shares of the Company’s common stock as the award vests. The fair value of each RSU is based on the fair market value of the Company’s common stock on the date of grant. The Company has granted RSUs that vest in three equal annual installments provided that the employee remains employed with the Company. Beginning in the first quarter of 2016 and in 2017 and 2018, the Company granted time-based RSUs that vest in three equal annual installments. In the first quarter of 2017, the Company granted performance-based RSUs, which vest based on the achievement of certain milestones that include (i) the submission of a NDA with the FDA, (ii) the approval of the NDA by the FDA (collectively, the “Milestone RSUs”) and (iii) the achievement of certain comparative shareholder returns against the Company’s peers (the “TSR RSUs”). The Milestone RSUs were valued at the closing price on March 8, 2017. The Milestone RSUs related to the NDA submission has been fully amortized through December 31, 2018. The NDA submission milestone was achieved in the third quarter of 2018, so the Milestone RSUs related to the NDA submission vested on December 31, 2018. The amortization of the expenses for Milestone RSUs related to the approval of the NDA will commence if and when the NDA submission has been approved through the last day of the calendar year in which the milestone is achieved. The TSR RSUs were valued using the Monte Carlo Simulation method and will be amortized over the life of the RSU agreements which ends December 31, 2019. The Milestone RSUs and TSR RSUs are target based and the ultimate awards, if attained, could be the target amount or higher or lower than the target amount, depending on the timing or achievement of the goal. The expense recognition related to these equity grants is based on the Company’s best estimate. Under ASC Topic 718, the cumulative amount of compensation cost recognized for instruments classified as equity that ordinarily would result in a future tax deduction under existing tax law shall be considered to be a deductible difference in applying ASC Topic 740, Income Taxes Since the Company had net operating loss carryforwards as of December 31, 2018, 2017 and 2016, no excess tax benefits for the tax deductions related to share-based awards were recognized in the statements of operations. In March 2016, the FASB issued ASU No. 2016-09, 2016-09”). 2016-09 2016-09 Equity instruments issued to non-employees 505-50, Equity/Equity-Based Payments to Non-Employees In June 2018, the Company’s stockholders approved the Company’s 2018 Equity Incentive Plan pursuant to which 4,750,000 additional shares of common stock were reserved for future equity grants. Loss Per Share Basic net loss per common share is determined by dividing the net loss by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common stock equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company’s stock option grants and RSUs. The following common stock equivalents were excluded in the calculation of diluted loss per share because their effect would be anti-dilutive as applied to the net loss for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 Common Stock Equivalents 610,429 476,252 1,225,614 RSUs 386,678 87,988 32,781 TSR RSUs 48,500 65,852 — Recently Issued Accounting Standards In May 2014, the FASB issued ASC Update No. 2014-09, The Company adopted this standard using the “modified retrospective method” which did not result in an impact to its financial statements as the Company has not had product sales to date. Upon commercializing a product or executing any revenue generating contracts, the Company will provide additional disclosures in the notes to the consolidated financial statements related to the relevant aspects of any revenue generating contracts that the Company has or into which the Company expects to enter. In January 2016, the FASB issued ASU No. 2016-01, 2016-01”). 2016-01 available-for-sale 2016-01 In February 2016, the FASB issued ASU No. 2016-02, 2016-02”). 2016-02 2016-02 We estimate adoption of the standard will result in recognition of additional net lease assets and lease liabilities of approximately $18 million and $21 million, respectively, as of January 1, 2019. The difference between these amounts represents the net deferred rent as of January 1, 2019 with no impact on the accumulated deficit. We do not believe the new standard will have a notable impact on our liquidity. In February 2018, the FASB issued ASU No. 2018-02, In June 2018, the FASB issued ASU No. 2018-07, 2018-07”). 2018-07. |