Acquisitions (Narrative) (Details) (USD $)	6 Months Ended				0 Months Ended		6 Months Ended	0 Months Ended	6 Months Ended	12 Months Ended	1 Months Ended	0 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	May 31, 2012 Amadesa Ltd. [Member]	Jun. 13, 2012 Look.io [Member]	Jun. 30, 2012 Look.io [Member]	Nov. 09, 2012 Engage Pty Ltd. [Member]	Jun. 30, 2014 Engage Pty Ltd. [Member]	Dec. 31, 2012 Engage Pty Ltd. [Member]	Mar. 31, 2014 NexGraph, LLC [Member]	Jun. 02, 2014 Synchronite, LLC [Member]	Jun. 30, 2014 Synchronite, LLC [Member]
Business Acquisition [Line Items]
Business acquisition, acquisition date					May 31, 2012	Jun. 13, 2012		Nov. 09, 2012			Mar. 01, 2014	Jun. 02, 2014
Purchase price consideration						$ 2,884,000		$ 10,591,000				$ 4,100,000
Acquired intangible asset, aggregate cash consideration					10,300,000						500,000
Intangible assets					500,000	767,000		3,600,000			100,000	1,451,000	1,450,000
Business acquisition, shares of common stock issued						109,517
Cash payment	2,300,000	0				900,000
Acquisition costs incurred to acquire entity							200,000			500,000			400,000
Goodwill	35,783,000		32,724,000	32,645,000		2,405,000		6,152,000			400,000		2,650,000
Business acquisition, value of shares of common stock issued						2,000,000
Potential shares of common stock in addition to purchase price						30,422
Potential shares of common stock, value						600,000
Weighted average shares outstanding used in basic and diluted net income per share as of the acquisition date						109,517
Assets acquired liabilities assumed, net								800,000				45,000
Potential earn-out consideration								1,600,000				1,800,000
Payment of a portion of potential earn-out consideration amount									$ 200,000