Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2015

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands): 

	September 30, 2015		December 31, 2014
	(unaudited)
Research and development services	$	2,425	$	1,845
Legal and professional services	320		1,253
Employee compensation	1,176		1,379
Unearned revenue	27		524
Total accrued liabilities	$	3,948	$	5,001