Accrued Liabilities

12 Months Ended

Dec. 31, 2013

7. 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:

	December 31, 2013		December 31, 2012

Accrued clinical trial and clinical supply costs	$	2,253	$	3,335
Accrued compensation		5,016		2,492
Accrued rebates and allowances		1,132		—
Accrued product costs		3,274		—
Accrued sales and marketing expenses		1,077		1,315
Accrued interest		619		213
Other accrued liabilities		1,801		505


	$	15,172	$	7,860

Accrued clinical trial and clinical supply costs consist primarily of investigator fees, contract research organization services, contract manufacturing, pass-through costs and laboratory costs. Other accrued liabilities consist primarily of professional fees, distribution fees relating to our products, and miscellaneous accrued expenses.