Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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):

	For the Three Months Ended June 30,					For the Six Months Ended June 30,
	2017			2016		2017			2016
	(unaudited)					(unaudited)
Cost of revenues	$	—		$	—	$	—		$	2
Selling and marketing		(36	)		84		(33	)		154
Research and development		46			127		125			248
General and administrative		207			194		344			361
Restructuring expense		171			—		398			—
Total non-cash stock compensation expense	$	388		$	405	$	834		$	765