Subsequent Events	12 Months Ended
Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The company evaluated all events or transactions that occurred after December 31, 2013 up through the date these financial statements were issued. Other than as disclosed elsewhere in the notes to the condensed consolidated financial statements, the company did not have any material recognizable or unrecognizable subsequent events, except as described below. For the period of January 1, 2014 through March 14, 2014, we issued an additional 5,072,900 shares of our common stock as a result of 5,095,616 warrant exercises. Cash proceeds from the warrant exercises during this period were $9,371,000. As of March 14, 2014, we had 9,753,815 warrants outstanding. For the period of January 1, 2014 through March 14, 2014, we issued an additional 3,158,338 shares of our common stock as a result of 3,182,764 stock option exercises. Cash proceeds from the stock option exercises during this period were $3,889,000. As of March 14, 2014 we had 9,335,403 stock options outstanding. Effective January 14, 2014, we entered into a strategic development and commercialization partnership with Dr. Reddy's Laboratories Ltd. ("Dr. Reddy's"). We licensed commercial rights to Dr. Reddy's for NeuVax in breast and gastric cancers in India. Dr. Reddy's will lead the Phase 2 development of NeuVax in gastric cancer, significantly expanding the potential addressable patient population. In February and March 2014, two purported shareholder derivative complaints-Fagin v. Ahn, No. 140202384 (Or. Cir. Ct.), and Werbowsky v. Hillsberg, No. 3:14-cv-382 (D. Or.)-were filed against our company, as nominal defendant, and certain of our officers and directors in the Circuit Court of Oregon for the County of Multnomah and in the United States District Court for the District of Oregon. The complaints allege, among other things, breaches of fiduciary duties and abuse of control by the officers and directors in connection with various public statements purportedly issued by us or on our behalf and sales of our common stock by the officers and directors in January and February of this year. In March 2014, three purported securities class action complaints- Deering v. Galena Biopharma, Inc., No. 3:14-cv-367 (D. Or.), Hau v. Galena Biopharma, Inc., No. 3:14-cv-389 (D. Or.), and Clavijo v. Galena Biopharma, Inc., No. 3:14-cv-410 (D. Or.)-were filed against our company and certain of our officers in the United States District Court for the District of Oregon. The complaints allege that the defendants violated the federal securities laws by making materially false and misleading statements in press releases and in filings with the SEC arising out of the same circumstances that are the subject of the derivative actions described above. In February 2014, we learned that the SEC is investigating certain matters relating to our company and an outside investor-relations firm that we retained in 2013. We have been in contact with the SEC staff through our counsel and are cooperating with the investigation. Based on the very early stage of the litigation, it is not possible to estimate the amount or range of possible loss that might result from an adverse judgment or a settlement of these matters.

Subsequent Events

The company evaluated all events or transactions that occurred after December 31, 2013 up through the date these financial statements were issued. Other than as disclosed elsewhere in the notes to the condensed consolidated financial statements, the company did not have any material recognizable or unrecognizable subsequent events, except as described below.

For the period of January 1, 2014 through March 14, 2014, we issued an additional 5,072,900 shares of our common stock as a result of 5,095,616 warrant exercises. Cash proceeds from the warrant exercises during this period were $9,371,000. As of March 14, 2014, we had 9,753,815 warrants outstanding.

For the period of January 1, 2014 through March 14, 2014, we issued an additional 3,158,338 shares of our common stock as a result of 3,182,764 stock option exercises. Cash proceeds from the stock option exercises during this period were $3,889,000. As of March 14, 2014 we had 9,335,403 stock options outstanding.

Effective January 14, 2014, we entered into a strategic development and commercialization partnership with Dr. Reddy's Laboratories Ltd. ("Dr. Reddy's"). We licensed commercial rights to Dr. Reddy's for NeuVax in breast and gastric cancers in India. Dr. Reddy's will lead the Phase 2 development of NeuVax in gastric cancer, significantly expanding the potential addressable patient population.

In February and March 2014, two purported shareholder derivative complaints-Fagin v. Ahn, No. 140202384 (Or. Cir. Ct.), and Werbowsky v. Hillsberg, No. 3:14-cv-382 (D. Or.)-were filed against our company, as nominal defendant, and certain of our officers and directors in the Circuit Court of Oregon for the County of Multnomah and in the United States District Court for the District of Oregon. The complaints allege, among other things, breaches of fiduciary duties and abuse of control by the officers and directors in connection with various public statements purportedly issued by us or on our behalf and sales of our common stock by the officers and directors in January and February of this year.

In March 2014, three purported securities class action complaints- Deering v. Galena Biopharma, Inc., No. 3:14-cv-367 (D. Or.), Hau v. Galena Biopharma, Inc., No. 3:14-cv-389 (D. Or.), and Clavijo v. Galena Biopharma, Inc., No. 3:14-cv-410 (D. Or.)-were filed against our company and certain of our officers in the United States District Court for the District of Oregon. The complaints allege that the defendants violated the federal securities laws by making materially false and misleading statements in press releases and in filings with the SEC arising out of the same circumstances that are the subject of the derivative actions described above.

In February 2014, we learned that the SEC is investigating certain matters relating to our company and an outside investor-relations firm that we retained in 2013. We have been in contact with the SEC staff through our counsel and are cooperating with the investigation.

Based on the very early stage of the litigation, it is not possible to estimate the amount or range of possible loss that might result from an adverse judgment or a settlement of these matters.