Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2012

Accrued Expenses

Accrued expenses consist of the following:

	September 30,		December 31,
	2012		2011
Payroll and benefits	$	2,172,045	$	2,498,492
Professional fees		452,140		1,052,058
Research grants		1,179,007		1,313,280
Other		585,810		457,764
Total	$	4,389,002	$	5,321,594