Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation [Abstract]

Stock-based non-cash compensation expenses

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(unaudited)				(unaudited)
Cost of revenues	$	3	$	5	$	9	$	27
Selling and marketing		212		336		651		1,431
Research and development		187		153		568		1,003
General and administrative		496		661		1,818		2,670
Restructuring expense		—		—		6		—
Total non-cash stock compensation expense	$	898	$	1,155	$	3,052	$	5,131