Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2016		2015
	(unaudited)
Cost of revenues	$	2	$	3
Selling and marketing		70		75
Research and development		121		169
General and administrative		168		329
Total non-cash stock compensation expense	$	361	$	576