Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Stock-based non-cash compensation expenses

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(unaudited)				(unaudited)
Cost of revenues	$	2	$	5	$	6	$	22
Selling and marketing		222		511		439		1,095
Research and development		195		344		381		850
General and administrative		557		1,009		1,322		2,009
Restructuring expense		—		—		6		—
Total non-cash stock compensation expense	$	976	$	1,869	$	2,154	$	3,976