Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Share Based Compensation [Abstract]

Stock-Based Compensation Expense

The following table sets forth the Company’s stock-based compensation expense (in thousands) for the periods indicated.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Stock options and employee stock purchase plan    awards
Research and development	$	16	$	29	$	41	$	74
Selling, general and administrative		97		76		200		175
Restricted stock awards
Research and development		31		80		81		181
Selling, general and administrative		28		111		96		268
Restricted stock units
Research and development		1		-		14		-
Selling, general and administrative		11		-		110		-
Total stock-based compensation	$	184	$	296	$	542	$	698