Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Non-Cash Compensation Expenses

Stock-based non-cash compensation expense related to stock options, restricted stock grants and the employee stock purchase plan were recorded in the financial statements as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
	(unaudited)				(unaudited)
Cost of revenues	$	—	$	3	$	2	$	6
Selling and marketing		84		83		154		158
Research and development		127		151		248		320
General and administrative		194		286		361		615
Total non-cash stock compensation expense	$	405	$	523	$	765	$	1,099