ACCRUED EXPENSES (Tables)

3 Months Ended

Mar. 31, 2015

Payables and Accruals [Abstract]

Summary of Accrued Expenses

The following table summarizes the Company’s accrued expenses for each of the periods indicated:

	As of March 31, 2015		As of December 31, 2014
	(in thousands)
Accrued contract manufacturing costs	$	4,006	$	3,271
Accrued contract research costs		4,553		3,782
Accrued employee compensation costs		3,022		6,170
Accrued professional fees		2,541		3,403
Accrued facility-related costs		224		300
Other accrued expenses		693		440
Total	$	15,039	$	17,366