BUSINESS AND BASIS OF PRESENTATION	9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]
BUSINESS AND BASIS OF PRESENTATION	1. BUSINESS AND BASIS OF PRESENTATION Business Sarepta Therapeutics, Inc. (together with its wholly-owned subsidiaries “Sarepta” or the “Company”) is a biopharmaceutical company focused on the discovery and development of unique RNA-targeted therapeutics for the treatment of rare, infectious and other diseases. Applying its proprietary, highly-differentiated and innovative platform technologies, the Company is able to target a broad range of diseases and disorders through distinct RNA-targeted mechanisms of action. The Company is primarily focused on rapidly advancing the development of its potentially disease-modifying Duchenne muscular dystrophy (“DMD”) drug candidates, including its lead DMD product candidate, eteplirsen, designed to skip exon 51. On August 25, 2015, the Company announced the filing by the Food and Drug Administration (“FDA”) of its new drug application (“NDA”) for eteplirsen for the treatment of DMD amenable to exon 51 skipping. Eteplirsen is under priority review with a Prescription Drug User Fee Act (“PDUFA”) action date of February 26, 2016. The Company is also developing therapeutics using its technology for the treatment of drug resistant bacteria and infectious, rare and other human diseases. The Company has not generated any revenue from product sales to date and there can be no assurance that revenue from product sales will be achieved. Even if it does achieve revenue from product sales, the Company is likely to continue to incur operating losses in the near term. On October 9, 2015, the Company completed a public offering whereby the Company sold 3,250,000 shares of common stock at a price of $39.00 per share. In addition, the Company granted the underwriters a 30-day option to purchase an additional 487,500 shares of common stock at a price of $39.00 per share. There can be no assurance that the underwriters will exercise the option. The Company received aggregate net proceeds from the offering of approximately $120.0 million, after deducting the underwriting discounts and offering-related transaction costs. As of September 30, 2015, the Company had approximately $111.4 million of cash, cash equivalents and investments, consisting of $55.8 million of cash and cash equivalents, $44.1 million of short-term investments and $11.5 million of restricted cash and investments. The Company believes that its balance of cash, cash equivalents and investments as of September 30, 2015, together with the net proceeds of approximately $120.0 million received from the Company’s common stock offering completed on October 9, 2015, is sufficient to fund its current operational plan for the next twelve months, though it may pursue additional cash resources through public or private financings, seek additional government contracts and establish collaborations with or license its technology to other companies. Basis of Presentation The accompanying unaudited condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), reflect the accounts of Sarepta Therapeutics, Inc. and its wholly-owned subsidiaries. All inter-company transactions between and among its consolidated subsidiaries have been eliminated. Management has determined that the Company operates in one segment: the development of pharmaceutical products on its own behalf or in collaboration with others. The information included in this quarterly report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and the accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014. Estimates and Uncertainties The preparation of the unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the valuation of stock-based awards, research and development expenses, revenue recognition and income taxes.

1. BUSINESS AND BASIS OF PRESENTATION

Business

Sarepta Therapeutics, Inc. (together with its wholly-owned subsidiaries “Sarepta” or the “Company”) is a biopharmaceutical company focused on the discovery and development of unique RNA-targeted therapeutics for the treatment of rare, infectious and other diseases. Applying its proprietary, highly-differentiated and innovative platform technologies, the Company is able to target a broad range of diseases and disorders through distinct RNA-targeted mechanisms of action. The Company is primarily focused on rapidly advancing the development of its potentially disease-modifying Duchenne muscular dystrophy (“DMD”) drug candidates, including its lead DMD product candidate, eteplirsen, designed to skip exon 51. On August 25, 2015, the Company announced the filing by the Food and Drug Administration (“FDA”) of its new drug application (“NDA”) for eteplirsen for the treatment of DMD amenable to exon 51 skipping. Eteplirsen is under priority review with a Prescription Drug User Fee Act (“PDUFA”) action date of February 26, 2016. The Company is also developing therapeutics using its technology for the treatment of drug resistant bacteria and infectious, rare and other human diseases.

The Company has not generated any revenue from product sales to date and there can be no assurance that revenue from product sales will be achieved. Even if it does achieve revenue from product sales, the Company is likely to continue to incur operating losses in the near term.

On October 9, 2015, the Company completed a public offering whereby the Company sold 3,250,000 shares of common stock at a price of $39.00 per share. In addition, the Company granted the underwriters a 30-day option to purchase an additional 487,500 shares of common stock at a price of $39.00 per share. There can be no assurance that the underwriters will exercise the option. The Company received aggregate net proceeds from the offering of approximately $120.0 million, after deducting the underwriting discounts and offering-related transaction costs.

As of September 30, 2015, the Company had approximately $111.4 million of cash, cash equivalents and investments, consisting of $55.8 million of cash and cash equivalents, $44.1 million of short-term investments and $11.5 million of restricted cash and investments. The Company believes that its balance of cash, cash equivalents and investments as of September 30, 2015, together with the net proceeds of approximately $120.0 million received from the Company’s common stock offering completed on October 9, 2015, is sufficient to fund its current operational plan for the next twelve months, though it may pursue additional cash resources through public or private financings, seek additional government contracts and establish collaborations with or license its technology to other companies.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), reflect the accounts of Sarepta Therapeutics, Inc. and its wholly-owned subsidiaries. All inter-company transactions between and among its consolidated subsidiaries have been eliminated. Management has determined that the Company operates in one segment: the development of pharmaceutical products on its own behalf or in collaboration with others. The information included in this quarterly report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and the accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.

Estimates and Uncertainties

The preparation of the unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the valuation of stock-based awards, research and development expenses, revenue recognition and income taxes.