Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Total Stock-Based Compensation Expense

Total stock-based compensation expense was allocated to research and development, manufacturing and production and general and administrative expense as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Research and development	$	69	$	93	$	228	$	309
Manufacturing and production		25		42		89		123
General and administrative		119		302		487		1,102
Total stock-based compensation expense	$	213	$	437	$	804	$	1,534