Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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

Stock-Based Compensation Expense

Stock-based compensation expense, net for the three and six months ended June 30 was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Cost of revenues	$	38	$	54	$	72	$	106
Selling, general and administrative		215		237		395		475
Research and development		34		49		74		88
Total stock-based compensation	$	287	$	340	$	541	$	669