Significant Accounting Policies | Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP). 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 Accounting Standards Updates (ASU) of the Financial Accounting Standards Board (FASB). The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. The Company records net income (loss) attributable to non-controlling interest in the Company’s consolidated financial statements equal to percentage of ownership interest retained in the respective operations by the non-controlling parties. The Company has no unconsolidated subsidiaries. Going Concern Due to the introduction of generic competition against Angiomax and the divestiture of certain of the Company’s non-core products, the Company’s revenues generated from product sales have declined significantly since 2014. Revenues are expected to continue to decline as generic competition for Angiomax increases. The Company has incurred net losses and negative cash flows from operations since 2014 and had an accumulated deficit of $1.3 billion as of December 31, 2017 . The Company expects to incur significant expenses and operating losses for the foreseeable future as it continues to develop, seek regulatory approval for and commercially launch inclisiran. As a result of the completion of the sale of the Company’s infectious disease business on January 5, 2018, the Company believes that its existing cash and cash equivalents of approximately $151.4 million as of December 31, 2017 , together with the cash flows it expects to generate from product sales and royalties and the proceeds received from Melinta at the closing of the sale of the infectious disease business, will be sufficient to satisfy its anticipated operating and other funding requirements for the next twelve months from March 1, 2018 (the date of filing this Form 10-K). Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, costs, expenses and accumulated other comprehensive income/(loss) that are reported in the consolidated financial statements and accompanying disclosures. Actual results may be different. Investments The Company accounts for its common stock investment in a minority interest of a company that does not have a readily determinable fair value over which it does not exercise significant influence on the cost method. Under the cost method, an investment is carried at cost until it is sold or there is evidence that changes in the business environment or other facts and circumstances suggest it may be other than temporarily impaired. Investments in which the Company has at least a 20%, but not more than a 50%, interest are generally accounted for under the equity method. These non-marketable securities have been classified as investments and included in other assets on the accompanying consolidated balance sheets. The Company’s proportionate share of the operating results is recorded as loss in equity investment in the Company’s consolidated statement of operations. On February 2, 2015, the Company completed the acquisition of Annovation, and Annovation became the Company’s wholly owned subsidiary. See Note 6 “Acquisition” for further details. Inventory The Company records inventory upon the transfer of title from the Company’s vendors. Inventory is stated at the lower of cost or net realizable value and valued using first-in, first-out methodology. Angiomax and Ionsys bulk substances are classified as raw materials and their costs are determined using acquisition costs from the Company’s contract manufacturers. The Company records work-in-progress costs of filling, finishing and packaging against specific product batches. Fixed Assets Fixed assets are stated at cost. Depreciation is provided using the straight-line method based on estimated useful lives or, in the case of leasehold improvements, over the lesser of the useful lives or the lease terms. Repairs and maintenance costs are expensed as incurred. Treasury Stock Treasury stock is recognized at the cost to reacquire the shares. Shares issued from treasury are recognized utilizing the first-in first-out method. Intangible Assets with Definite Useful Lives Intangible assets with definite useful lives are amortized over their estimated useful lives and reviewed for impairment if certain events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. In-Process Research and Development The cost of in-process research and development (IPR&D) acquired directly in a transaction other than a business combination is capitalized if the projects have an alternative future use; otherwise it is expensed. The fair values of IPR&D projects acquired in business combinations are capitalized. Several methods may be used to determine the estimated fair value of the IPR&D acquired in a business combination. The Company utilizes the “income method,” which applies a probability weighting that considers the risk of development and commercialization to the estimated future net cash flows that are derived from projected sales revenues and estimated costs. These projections are based on factors such as relevant market size, patent protection, historical pricing of similar products and expected industry trends. The estimated future net cash flows are then discounted to the present value using an appropriate discount rate. This analysis is performed for each project independently. The Company also considers qualitative factors such as development of competing drugs, status in the development cycle of the product, regulatory developments and other qualitative factors. These assets are treated as indefinite-lived intangible assets until completion or abandonment of the projects, at which time the assets are amortized over the remaining useful life or written off, as appropriate. These are tested at least annually or when a triggering event occurs that could indicate a potential impairment. In August 2017, the Company announced that it discontinued the clinical development program for MDCO-700. In connection with this decision, the Company recorded impairment charges of $65.0 million related to IPR&D acquired from Annovation. Goodwill Goodwill represents the excess consideration in a business combination over the fair value of identifiable net assets acquired. Goodwill is not amortized, but subject to impairment testing at least annually or when a triggering event occurs that could indicate a potential impairment. The Company determines whether goodwill may be impaired by comparing the carrying value of its reporting unit to the fair value of its reporting unit. A reporting unit is defined as an operating segment or one level below an operating segment. Based on the Company’s evaluation, goodwill was not impaired as of December 31, 2017 . Contingent Purchase Price From Sale of Business The Company has contingent assets for certain specified calendar year net sales milestones as part of the sales of the Hemostasis Business and the Non-Core ACC Products. In determining the fair value of these sales milestones, considerable judgment is required to interpret the market data used to develop the assumptions and estimates. The Company utilizes either the “income method” or a risk adjusted revenue simulation model. The income method applies a probability weighting that considers the estimated future net sales of each of the respective products to determine the probability that each sale milestone will be met. These projections were based on factors such as relevant market size, patent protection, historical pricing of similar products and expected industry trends. In a risk adjusted revenue simulation model, the chances of achieving many different revenue levels are estimated and then adjusted to reflect the results of similar products and companies in the market to calculate the fair value of each milestone payment. The breadth of all possible revenue scenarios is captured in an estimate of revenue volatility - a measure that can be estimated from performance of similar companies in the market. The Company estimated revenue volatility as the delivered asset volatility observed in comparable companies’ historical performance, where the delivering asset was based on operational leverage of the Company. Under each of these possible scenarios, different amounts of the sales-based milestone payments are calculated, and the average of the payments across a range of possible scenarios is deemed to be the expected value of the earn-out payments. The Company will recognize any increases in the carrying amount or impairments of the contingent purchase price if and when the milestones are achieved or determined to have no value. In the fourth quarter of 2017, the Company decreased the carrying value of the contingent purchase price from the sale of the Hemostasis Business by $63.0 million to an estimated fair value of zero, which is a Level 3 fair value measurement, as a result of the discontinuation of Raplixa by Mallinckrodt. The Company noted no indicators of impairment on the carrying amounts of the remaining contingent assets. In addition, the Company determined that the fair values of these contingent payments to be received from the buyers are not readily determinable at December 31, 2017, as the estimated future net sales of each of the respective products are determined by the future actions of the buyers. Long-Lived Assets Long-lived assets, such as property, plant and equipment and certain other long-term assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying amount of the assets exceed their estimated future undiscounted net cash flows, an impairment charge is recognized for the amount by which the carrying amount of the assets exceed the fair value of the assets. Contingent Purchase Price from Business Combinations Subsequent to the acquisition date, the Company measures the fair value of the acquisition-related contingent consideration at each reporting period, with changes in fair value recorded in selling, general and administrative in the accompanying consolidated statements of operations. Changes to contingent consideration obligations can result from adjustments to discount rates and periods, updates in the assumed achievement or timing of any development or commercial milestone or changes in the probability of certain clinical events, the passage of time and changes in the assumed probability associated with regulatory approval. The fair value measurement is based on significant inputs not observable in the market and thus represents a Level 3 measurement as defined in fair value measurement accounting. Risks and Uncertainties The Company is subject to risks common to companies in the pharmaceutical industry including, but not limited to, uncertainties related to commercialization of products, regulatory approvals, dependence on key products, dependence on key customers and suppliers, and protection of intellectual property rights. Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk include cash, cash equivalents and accounts receivable. The Company believes it minimizes its exposure to potential concentrations of credit risk by placing investments with high quality institutions. At December 31, 2017 and 2016 , approximately $12.1 million and $56.1 million , respectively, of the Company’s cash and cash equivalents was invested in a single fund, the Dreyfus Cash Management Money Market Fund, a no-load money market fund with Capital Advisors Group. The Company currently sells branded Angiomax in the United States to a sole source distributor, Integrated Commercialization Solutions, Inc. (ICS). ICS accounted for 5% , 48% and 87% of the Company’s net product revenues for 2017 , 2016 and 2015 , respectively. At December 31, 2017 and 2016 , amounts due from ICS represented approximately $2.9 million and $2.2 million , or 27% and 11% , of gross accounts receivable, respectively. Product sales to Sandoz accounted for 55% and 23% of the Company’s net product revenues for 2017 and 2016 , respectively. At December 31, 2017 and 2016 , amounts due from Sandoz related to product sales were approximately $0.9 million or 8% and $5.6 million or 27% , respectively, of gross accounts receivable. At December 31, 2017 and 2016 , amounts due from Sandoz related to royalty revenues were approximately $4.2 million or 40% and $9.1 million or 43% , respectively, of gross accounts receivable. Contingencies The Company may be, from time to time, a party to various disputes and claims arising from normal business activities. The Company continually assesses litigation to determine if an unfavorable outcome would lead to a probable loss or reasonably possible loss which could be estimated. In accordance with the guidance of the FASB on accounting for contingencies, the Company accrues for all contingencies at the earliest date at which the Company deems it probable that a liability has been incurred and the amount of such liability can be reasonably estimated. If the estimate of a probable loss is a range and no amount within the range is more likely than another, the Company accrues the minimum of the range. In the cases where the Company believes that a reasonably possible loss exists, the Company discloses the facts and circumstances of the litigation, including an estimable range, if possible. Revenue Recognition Product Sales. The Company distributes branded Angiomax in the United States through a sole source distribution model with Integrated Commercialization Solutions (ICS). The Company sold Cleviprex, Kengreal and ready-to-use Argatroban and Minocin, Orbactiv and Vabomere under this model up until the sale of these products to Chiesi and Melinta, respectively. See Note 22, “Dispositions,” for further details regarding the products sold to Chiesi and Note 23, “Discontinued Operations,” for further details regarding the products sold to Melinta. ICS then primarily sells branded Angiomax, and previously sold the other product, to a limited number of national medical and pharmaceutical wholesalers with distribution centers located throughout the United States. Prior to July 1, 2015, sales of Angiomax in the United States were recognized upon shipment to ICS. As a result of the entrance of generic products in the marketplace beginning in the third quarter of 2015, the Company could not reasonably estimate its chargebacks with respect to branded Angiomax between July 1, 2015 and August 30, 2017, and sales of branded Angiomax in the United States were recognized under a deferred revenue model during that period. Under the deferred revenue model, the Company did not recognize revenue upon product shipment of branded Angiomax to ICS. Instead, upon product shipment, the Company invoiced ICS, recorded deferred revenue at gross invoice sales price, classified the cost basis of the product held by ICS as finished goods inventory held by others and included such cost basis amount within prepaid expenses and other current assets on the consolidated balance sheets. The Company recognized revenue when hospitals purchased the products and the transaction consideration became fixed or determinable. Beginning September 1, 2017, the Company had sufficient market information to reasonably estimate its chargebacks, returns and other adjustments to gross revenues associated with branded Angiomax and recognizes sales upon shipment to ICS. This change in estimate did not materially impact net product revenues or cost of product revenues for the year ended December 31, 2017, and is not expected to materially impact net product revenues or costs of product revenues in future periods. Effective July 2, 2015, the Company entered into a supply and distribution agreement with Sandoz under which it has granted Sandoz the exclusive right to sell in the United States an authorized generic of Angiomax (bivalirudin). The Company recognizes sales of generic Angiomax to Sandoz under a deferred revenue model. In accordance with the Sandoz agreement, the Company receives a royalty based on Sandoz’s gross margin, as defined in the agreement, of the authorized generic product sold by Sandoz to hospitals. The Company recognizes royalty revenue on an accrual basis in the period it is reported by Sandoz. During 2017 and 2016 , the Company recognized royalty revenue of $25.8 million and $71.2 million , respectively. The Company’s agreement with ICS provides that ICS will be the Company’s exclusive distributor of branded Angiomax and acute care generic products in the United States. Under the terms of this fee-for-service agreement, ICS places orders with the Company for sufficient quantities to maintain an appropriate level of inventory based on the Company’s customers’ historical purchase volumes. ICS assumes all credit and inventory risks, is subject to the Company’s standard return policy and has sole responsibility for determining the prices at which it sells these products, subject to specified limitations in the agreement. The agreement terminates on February 28, 2019 and will automatically renew for additional one -year periods unless either party gives notice at least 90 days prior to the automatic extension. Either party may terminate the agreement at any time and for any reason upon 180 days’ prior written notice to the other party. In Europe, the Company markets and sells Angiomax, which the Company markets under the trade name Angiox. The Company recognizes revenue from such sales when hospitals purchase the product. The Company had deferred revenue of $0.2 million and $1.7 million as of December 31, 2017 and 2016 , respectively, associated with sales of Angiomax to wholesalers outside of the United States. The Company does not recognize revenue from product sales until there is persuasive evidence of an arrangement, delivery has occurred, the price is fixed or determinable, the buyer is obligated to pay the Company, the obligation to pay is not contingent on resale of the product, the buyer has economic substance apart from the Company, the Company has no obligation to bring about the sale of the product, the amount of returns can be reasonably estimated and collectability is reasonably assured. The Company records allowances for chargebacks and other discounts or accruals for product returns, rebates and fee-for-service charges at the time of sale, and reports revenue net of such amounts. In determining the amounts of certain allowances and accruals, the Company must make significant judgments and estimates. For example, in determining these amounts, the Company estimates hospital demand, buying patterns by hospitals and group purchasing organizations from wholesalers and the levels of inventory held by wholesalers and by ICS. Making these determinations involves estimating whether trends in past wholesaler and hospital buying patterns will predict future product sales. The Company receives data periodically from ICS and wholesalers on inventory levels and levels of hospital purchases and the Company considers this data in determining the amounts of these allowances and accruals. The specific considerations the Company uses in estimating these amounts are as follows: • Product returns. The Company’s customers have the right to return any unopened product during the 18 -month period beginning six months prior to the labeled expiration date and ending 12 months after the labeled expiration date. As a result, in calculating the accrual for product returns, the Company must estimate the likelihood that product sold might not be used within six months of expiration and analyze the likelihood that such product will be returned within 12 months after expiration. The Company considers all of these factors and adjusts the accrual periodically throughout each quarter to reflect actual experience. When customers return product, they are generally given credit against amounts owed. The amount credited is charged to the Company’s product returns accrual. In estimating the likelihood of product being returned, the Company relies on information from ICS and wholesalers regarding inventory levels, measured hospital demand as reported by third-party sources and internal sales data. The Company also considers the past buying patterns of ICS and wholesalers, the estimated remaining shelf life of product previously shipped, the expiration dates of product currently being shipped, price changes of competitive products and introductions of generic products. At December 31, 2017 and 2016 , the Company’s accrual for product returns was $4.3 million and $1.6 million , respectively. • Chargebacks and rebates. Although the Company primarily sells Angiomax to ICS in the United States, the Company typically enters into agreements with hospitals, either directly or through group purchasing organizations acting on behalf of their hospital members, in connection with the hospitals’ purchases of Angiomax. Based on these agreements, most of the Company’s hospital customers have the right to receive a discounted price for Angiomax and volume-based rebates on Angiomax purchases. In the case of discounted pricing, the Company typically provides a credit to ICS, or a chargeback, representing the difference between ICS’ acquisition list price and the discounted price. In the case of the volume-based rebates, the Company typically pays the rebate directly to the hospitals. The Company also participates in the 340B Drug Pricing Program under the Public Health Services Act. Under the 340B Drug Pricing Program, the Company offers qualifying entities a discount off the commercial price of Angiomax for patients undergoing percutaneous coronary intervention on an outpatient basis. As a result of these agreements, at the time of product shipment, the Company estimates the likelihood that product sold to ICS might be ultimately sold to a contracting hospital or group purchasing organization. The Company also estimates the contracting hospital’s or group purchasing organization’s volume of purchases. The Company bases its estimates on industry data, hospital purchases and the historic chargeback data it receives from ICS, most of which ICS receives from wholesalers, which details historic buying patterns and sales mix for particular hospitals and group purchasing organizations, and the applicable customer chargeback rates and rebate thresholds. With the entrance of generic products and their impact on pricing in the marketplace, the Company is no longer able to reasonably estimate these chargebacks with respect to Angiomax. The Company’s allowance for chargebacks was $5.9 million and $1.9 million at December 31, 2017 and 2016 , respectively. The Company’s allowance for rebates was not material at December 31, 2017 and 2016 . • Fees-for-service. The Company offers discounts to certain wholesalers, Cardinal Health Inc. and ICS based on contractually determined rates for certain services. The Company estimates its fee-for-service accruals and allowances based on historical sales, wholesaler and distributor inventory levels and the applicable discount rate. The Company’s discounts are accrued at the time of the sale and are typically settled within 60 days after the end of each respective quarter. The Company’s fee-for-service accruals and allowances were $0.9 million and $0.8 million at December 31, 2017 and 2016 , respectively. The Company has adjusted its allowances for chargebacks and accruals for product returns, rebates and fees-for-service in the past based on actual sales experience, and the Company will likely be required to make adjustments to these allowances and accruals in the future. The Company continually monitors its allowances and accruals and makes adjustments when it believes actual experience may differ from its estimates. The following table provides a summary of activity with respect to the Company’s sales allowances and accruals during 2017 , 2016 and 2015 (amounts in thousands): Cash Discounts Returns Chargebacks Rebates Fees-for- Service Balance at January 1, 2015 $ 4,142 $ 3,349 $ 44,399 $ — $ 924 Allowances for sales during 2015 9,212 12,143 107,564 833 14,249 Actual credits issued for prior year’s sales (3,927 ) (3,528 ) (40,419 ) — (1,179 ) Actual credits issued for sales during 2015 (8,540 ) (3,221 ) (95,828 ) (733 ) (11,314 ) Balance at December 31, 2015 887 8,743 15,716 100 2,680 Allowances for sales during 2016 1,854 (1,424 ) 36,197 (6 ) 3,166 Actual credits issued for prior year’s sales (887 ) (5,233 ) (15,610 ) (50 ) (2,655 ) Actual credits issued for sales during 2016 (1,573 ) (502 ) (34,408 ) (29 ) (2,365 ) Balance at December 31, 2016 281 1,584 1,895 15 826 Allowances for sales during 2017 1,746 4,439 17,395 271 3,085 Actual credits issued for prior year’s sales (281 ) (1,464 ) (1,246 ) (15 ) (865 ) Actual credits issued for sales during 2017 (775 ) (220 ) (12,172 ) (126 ) (2,152 ) Balance at December 31, 2017 $ 971 $ 4,339 $ 5,872 $ 145 $ 894 International Distributors. Under the Company’s agreements with its primary international distributors, the Company sells Angiomax to these distributors at a fixed price. The established price is typically determined once per year, prior to the first shipment of Angiomax to the distributor each year. The minimum selling price used in determining the price is 50% of the average net unit selling price. Revenue associated with sales to the Company’s international distributors during 2017 , 2016 and 2015 was $0.2 million , $1.1 million and $1.1 million , respectively. Cost of Product Revenues Cost of product revenues consists of expenses in connection with the manufacture of Angiomax, Cleviprex, ready-to-use Argatroban, Kengreal and Ionsys, royalty expenses under the Company’s agreements with Biogen Idec (Biogen) and Health Research Inc. (HRI) related to Angiomax, with AstraZeneca AB (AstraZeneca) related to Cleviprex and with Eagle Pharmaceuticals, Inc. (Eagle) related to ready-to-use Argatroban and the logistics costs related to Angiomax, Cleviprex, ready-to-use Argatroban, Kengreal and Ionsys including distribution, storage and handling costs. Amounts billed for shipping and handling are recorded as revenue. Shipping and handling expenses are recorded as a component of cost of product revenue. Advertising Costs The Company expenses advertising costs as incurred. Advertising costs were approximately $1.2 million for the year ended December 31, 2015 . Advertising costs for the years ended December 31, 2017 and 2016 were de minimis. Research and Development Research and development costs are expensed as incurred. Clinical study costs are accrued over the service periods specified in the contracts and adjusted as necessary based upon an ongoing review of the level of effort and costs actually incurred. Payments for a product license prior to regulatory approval of the product and payments for milestones achieved prior to regulatory approval of the product are expensed in the period incurred as research and development. Milestone payments made in connection with regulatory approvals are capitalized and amortized to cost of revenue over the remaining useful life of the asset. The Company performs research and development for US government agencies under a cost-reimbursable contract in which the Company is reimbursed for direct costs incurred plus allowable indirect costs. The Company recognizes the reimbursements under research contracts when a contract has been executed, the contract price is fixed and determinable, delivery of services or products has occurred and collection of the contract price is reasonably assured. The reimbursements are classified as an offset to research and development expenses. Payments received in advance of work performed are deferred. The Company recorded approximately $9.0 million , $15.8 million and $22.5 million of reimbursements by the government as a reduction of research and development expenses for the years ended December 31, 2017 , 2016 and 2015 , respectively. Share-Based Compensation The Company recognizes expense using the accelerated expense attribution method in an amount equal to the fair value of all share-based awards granted to employees. The Company estimates the fair value of its options on the date of grant using the Black-Scholes closed-form option-pricing model. Expected volatilities are based principally on historic volatility of the Company’s common stock. The Company uses historical data to estimate forfeiture rate. The expected term of options represents the period of time that options granted are expected to be outstanding. The Company has made a determination of expected term by analyzing employees’ historical exercise experience. The risk-free interest rate is based on the U.S. Treasury yield in effect at the time of grant corresponding with the expected life of the options. Foreign Currencies The functional currencies of the Company’s foreign subsidiaries primarily are the local currencies: Euro, Swiss franc, and British pound sterling. The Company’s assets and liabilities are translated using the current exchange rate as of the balance sheet date. Stockholders’ equity is translated using historical rates at the balance sheet date. Revenues and expenses and other items of income are translated using a weighted average exchange rate over the period ended on the balance sheet date. Adjustments resulting from the translation of the financial statements of the Company’s foreign subsidiaries into U.S. dollars are excluded from the determination of net earnings (loss) and are accumulated in a separate component of stockholders’ equity. Foreign exchange transaction gains and losses are included in other income (loss) in the Company’s results of operations. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company records net deferred tax assets to the extent it believes these assets will more likely than not be realized. On a periodic basis, the Company evaluates the realizability of its deferred tax assets net of deferred tax liabilities and adjusts such amounts in light of changing facts and circumstances, including but not limited to its level of past and future taxable income, the current and future expected utilization of tax benefit carryforwards, any regulatory or legislative actions by relevant authorities with respect to the Angiomax patents, and the status of litigation with respect to those patents. The Company considers all available evidence, both positive and negative, to determine whether, based on the weight of that evidence, a valuation allowance is required to reduce the net deferred tax assets to the amount that is more likely than not to be realized in future periods. The Company’s annual effective tax rate is based on pre-tax earnings adjusted for differences between GAAP and income tax accounting, existing statutory tax rates, limitations on the use of net operating loss and tax credit carryforwards and tax planning opportunities available in the jurisdictions in which it operates. The Company records uncertain tax positions on the basis of a two-step process whereby (1) it determines whether it is more likely than not that a tax |