Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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 March 31,
	2017		2016
Stock options and employee stock purchase plan    awards
Research and development	$	9	$	25
Selling, general and administrative		30		103
Restricted stock awards
Research and development		12		50
Selling, general and administrative		17		68
Restricted stock units
Research and development		18		13
Selling, general and administrative		42		99
Total stock-based compensation	$	128	$	358