Goodwill and Acquired Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible assets consist of the following:

		March 31,2013						December 31, 2012
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Developed technology	3 years	$	4,357	$	1,436	$	2,921	$	4,357	$	1,222	$	3,135
Customer relationships	3.75 years		3,315		1,105		2,210		3,315		822		2,493
Publisher relationships	5 years		710		118		592		710		83		627
Trade name	5 years		570		95		475		570		67		503
		$	8,952	$	2,754	$	6,198	$	8,952	$	2,194	$	6,758

Future Estimated Amortization Expense for Assets Placed in Service

Future estimated amortization expense for assets placed in service as of March 31, 2013 is as follows:

Remainder of 2013	$	1,843
2014		2,196
2015		1,583
2016		470
2017		106
Total	$	6,198