Accrued Liabilities

3 Months Ended

Mar. 31, 2013

Accrued Liabilities

Accrued Liabilities

8.  Accrued Liabilities

Accrued Liabilities are comprised of the following (and are included within the accounts payable and accrued expenses line item on the consolidated balance sheets), in thousands:

	March 31,		December 31,
	2013		2012
	(unaudited)
Accrued clinical trial costs	$	2,898	$	3,335
Accrued compensation	2,238		2,492
Interest payable	187		213
Other accrued liabilities	1,917		1,820
	$	7,240	$	7,860

Accrued clinical trial costs consist primarily of investigator fees, contract research organization services and laboratory costs.  Other accrued expenses consist primarily of marketing, sales and miscellaneous accrued expenses.