Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased 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,
	2017		2016
	(unaudited)
Cost of revenues	$	—	$	2
Selling and marketing		3		70
Research and development		79		121
General and administrative		137		168
Restructuring expense		227		—
Total non-cash stock compensation expense	$	446	$	361