Supplemental Balance Sheet Information (Table)

9 Months Ended

Sep. 30, 2012

Supplemental Balance Sheet Information [Abstract]

Accrued expenses

Accrued expenses consist of the following:

	September 30, 2012		December 31, 2011
Accrued compensation, benefits and withholdings	$	2,312	$	3,113
Clinical, manufacturing and scientific costs		1,229		819
Professional fees		399		619
Other		887		452
	$	4,827	$	5,003