Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Payables And Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	June 30, 2013 (unaudited)		December 31, 2012
Research and development related	$	3,205	$	3,678
Compensation related		1,320		1,889
Other		1,018		700
	$	5,543	$	6,267