Balance Sheet Components Other Long Term Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Balance Sheet Components [Abstract]
Long-term contingent consideration	$ 1,009	[1]	$ 0	[1]
Long-term deferred rent	28		0
Other long-term liabilities	$ 1,037		$ 0

[1] Long-term contingent consideration represents the fair value of the potential earn-out payments related to the acquisition of Treehouse based on the terms of the asset purchase agreement.