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Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	13. Related Party Transactions From 2011 to 2016, the Company retained TroyGould PC as outside corporate counsel. Sanford J. Hillsberg, the Chairman of Galena, is a senior lawyer with TroyGould PC. The Company incurred $209,000, $577,000, and $533,000 for services provided by TroyGould PC during the years ended December 31, 2016, 2015, and 2014, respectively. At December 31, 2015, Galena owed $20,000 to TroyGould PC. There was no payable to TroyGould PC as of December 31, 2016.

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- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

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