Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2012
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company recorded revenue from two advertising agencies (on behalf of their clients) whose parent company's Chief Executive Officer is a member of the Company's Board of Directors. The Company recorded revenue from these entities of $1.8 million, $5.1 million and $0.3 million for the years ended December 31, 2012, 2011 and 2010, respectively. There were accounts receivable from these entities of approximately $2.8 million as of December 31, 2012, and $1.0 million as of December 31, 2011. The Company recorded revenue from an affiliate of an investment bank firm whose representative is a former member of the Epocrates Board of Directors. The Company recorded no revenue from this entity for the year ended December 31, 2012, and recorded approximately $0.1 million and $0.2 million for the years ended December 31, 2011 and 2010 respectively. The Company recorded revenue from a pharmaceutical company who has a director who is also a member of the Company's Board of Directors. The Company recorded no revenue from this company for the year ended December 31, 2012, and recorded $0.2 million for both the years ended December 31, 2011 and 2010.

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.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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