Organization and Business Activities	3 Months Ended
Organization and Business Activities	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business Activities	Organization and Business Activities We are an integrated pharmaceutical company focused on finding ways to help medicines do more for patients. Eagle and our collaborators have the capabilities to take a molecule from preclinical research through regulatory approval and into the marketplace, including development, manufacturing and commercialization. Our business model applies our scientific expertise, proprietary research-based insights and marketplace proficiency to identify challenging-to-treat diseases of the central nervous system or metabolic critical care therapeutic areas as well as in oncology. By focusing on patients' unmet needs, Eagle strives to provide healthcare professionals with urgently needed treatment solutions that are designed to improve patient care and outcomes and create near- and long-term value for our stakeholders, including patients and healthcare providers and our employees, marketing partners, collaborators and investors. Our science-based business model has a proven track record with U.S. Food and Drug Administration ("FDA") approval and commercial launches of three products: RYANODEX® (dantrolene sodium) ("RYANODEX"), bendamustine ready-to-dilute ("RTD") 500ml solution ("BELRAPZO"), and rapidly infused bendamustine RTD ("BENDEKA"). We market our products through marketing partners and/or our internal direct sales force. Eagle markets RYANODEX and BELRAPZO, and Teva Pharmaceutical Industries Ltd. ("Teva") markets BENDEKA through its subsidiary Cephalon, Inc. Reflecting further expansion of our oncology portfolio, in February 2020, we received final FDA approval for PEMFEXY®, our novel pemetrexed product ("PEMFEXY"), a branded alternative to ALIMTA® for metastatic nonsquamous nonsmall cell lung cancer and malignant pleural mesothelioma. We expect to launch PEMFEXY in early 2022. With 11 pipeline projects underway and the potential for up to five or more product launches over the next several years, we believe we have growth opportunities ahead. We believe that each of our pipeline projects currently has the potential to enter the market as a first-in-class, first-to-file or best-in-class product. In particular, we are applying our expertise to conduct novel research regarding the potential for RYANODEX to address conditions including exertional heat stroke, Alzheimer's disease, traumatic brain injury/concussion, nerve agent exposure and acute radiation syndrome. In addition, our clinical development program includes a strategic partnership with Tyme Technologies (“Tyme”) for SM-88, a product candidate for the treatment of patients with pancreatic or other advanced cancers, as well as investigations of compounds such as EA-114, our fulvestrant product candidate, for patients with hormone receptor ("HR")-positive advanced breast cancer. Other products in development include Vasopressin, our first-to-file Abbreviated New Drug Application ("ANDA") that references Endo International plc's Vasostrict® indicated to increase blood pressure in adults with vasodilatory shock who remain hypotensive despite fluids and catecholamines; and EA-111, a new chemical entity and next-generation ryanodine receptor antagonist, in an intramuscular formulation that that would allow for easier and more rapid administration in emergency situations (military and civilian).