Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2013
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions As part of our sale of Series C and Series D preferred stock, we recorded a liability of $5.3 million for withholding taxes associated with the repurchase of our founder’s shares plus potential interest and penalties that may be imposed by the tax authorities. We recorded an offsetting receivable of $5.3 million in prepaid expenses and other current assets at June 30, 2010, representing the total amount that was subsequently paid to us by our founder in February 2012 for these withholding taxes. In April 2012, we paid $5.3 million to the tax authorities for these withholding taxes.

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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