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Organization and Nature of Operations and Basis of Presentation | 3 Months Ended
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Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | 1. Organization and Nature of Operations and Basis of Presentation Description of Business Synthetic Biologics, Inc. (the “Company” or “Synthetic Biologics”) is a microbiome-focused, clinical-stage company developing therapeutics to protect the microbiome while targeting pathogen-specific diseases. The Company is developing an oral biologic to protect the gut microbiome (gastrointestinal (GI) microflora) from intravenous (IV) antibiotics for the prevention of C. difficile infection and an oral statin treatment to reduce the impact of methane producing organisms on irritable bowel syndrome with constipation (IBS-C). In addition, the Company is developing a monoclonal antibody combination for the treatment of Pertussis in collaboration with Intrexon Corporation (NYSE: XON), and a Phase 2 oral estriol drug for the treatment of relapsing-remitting multiple sclerosis (MS) and cognitive dysfunction in MS.
Therapeutic Area |  | Product Candidate |  | Status
C. difficile infection prevention |  | SYN-004 (oral enzyme) |  | Initiated Phase 2a SYN-004 clinical trial during 1st quarter 2015; Phase 2b proof-of- concept SYN-004 clinical trial is expected to initiate during 2nd half 2015
Irritable bowel syndrome with constipation (IBS-C) |  | SYN-010 (oral compound) |  | Intend to initiate Phase 2 clinical trials during 2nd quarter of 2015; Collaboration with Cedars-Sinai Medical Center
Pertussis |  | SYN-005 (monoclonal antibodies) |  | Positive preclinical research findings reported at ECCMID in April 2015; Seeking non-dilutive funding to support clinical development of SYN-005; Collaborations with Intrexon and The University of Texas at Austin
Relapsing-remitting MS |  | Trimesta (oral estriol) |  | The lead principal investigator presented additional Phase 2 clinical outcome data, including more detailed results on improvements in cognitive and disability measures at the ACTRIMS-ECTRIMS Joint Meeting in September 2014; Partnership discussions ongoing pending data from University of California, Los Angeles (UCLA); MRI data review underway by UCLA
Cognitive dysfunction in MS |  | Trimesta (oral estriol) |  | Patient enrollment underway in Phase 2 clinical trial
Basis of Presentation The accompanying consolidated financial statements have been prepared pursuant to the rules and regulations of Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, they do not include all of the information and notes required by U.S. Generally Accepted Accounting Principles (“GAAP”) for complete financial statements. The accompanying consolidated financial statements include all adjustments, comprised of normal recurring adjustments, considered necessary by management to fairly state our results of operations, financial position and cash flows. The operating results for the interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2014 (“2014 Form 10-K”) as filed with the SEC. The interim results for the three months ended March 31, 2015, are not necessarily indicative of results for the full year. The consolidated financial statements are prepared in conformity with U.S. GAAP, which requires the use of estimates, judgments and assumptions that affect the amounts of assets and liabilities at the reporting date and the amounts of revenue and expenses in the periods presented. We believe that the accounting estimates employed are appropriate and the resulting balances are reasonable; however, due to the inherent uncertainties in making estimates actual results could differ from the original estimates, requiring adjustments to these balances in future periods.

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