401(k) Plan	12 Months Ended
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
401(k) Plan	401(k) Plan The Company has a defined contribution plan, entitled the Hemispherx Biopharma Employees 401(k) Plan and Trust Agreement (the “401(k) Plan”). Full time employees of the Company are eligible to participate in the 401(k) Plan following one year of employment. Subject to certain limitations imposed by federal tax laws, participants are eligible to contribute up to 15% of their salary (including bonuses and/or commissions) per annum. Participants' contributions to the 401(k) Plan may be matched by the Company at a rate determined annually by the Board of Directors. Each participant immediately vests in his or her deferred salary contributions, while Company contributions will vest over one year. The 6% Company matching contribution was effective as of January 1, 2010. For 2013, 2012 and 2011, the Company contributions towards the 401(k) Plan were $171,000, $138,000 and $148,000 respectively.

401(k) Plan

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

The Company has a defined contribution plan, entitled the Hemispherx Biopharma Employees 401(k) Plan and Trust Agreement (the “401(k) Plan”). Full time employees of the Company are eligible to participate in the 401(k) Plan following one year of employment. Subject to certain limitations imposed by federal tax laws, participants are eligible to contribute up to 15% of their salary (including bonuses and/or commissions) per annum. Participants' contributions to the 401(k) Plan may be matched by the Company at a rate determined annually by the Board of Directors.

Each participant immediately vests in his or her deferred salary contributions, while Company contributions will vest over one year. The 6% Company matching contribution was effective as of January 1, 2010. For 2013, 2012 and 2011, the Company contributions towards the 401(k) Plan were $171,000, $138,000 and $148,000 respectively.