Accrued Liabilities

3 Months Ended

Mar. 31, 2015

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities consist of the following (in thousands): 

	March 31, 2015		December 31, 2014
	(unaudited)
Research and development services	$	1,438	$	1,845
Legal and professional services	544		1,253
Employee compensation	299		1,379
Unearned revenue	225		524
Total accrued liabilities	$	2,506	$	5,001