CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Contract revenue		$ 2,913	$ 0	$ 3,037
Operating expenses:
Research and development	703	2,282	3,162	7,560
General and administrative	683	925	2,780	3,343
Total operating expenses	1,386	3,207	5,942	10,903
Loss from operations	(1,386)	(294)	(5,942)	(7,866)
Other income (expense):
Interest income	0	3	1	20
Interest expense	(219)	(220)	(640)	(620)
Other income, net	298	0	422	1
Net loss	(1,307)	(511)	(6,159)	(8,465)
Net income (loss) attributable to common stockholders	42,870	(3,690)	16,478	(17,930)
Net loss	(1,307)	(511)	(6,159)	(8,465)
Other comprehensive loss/income:
Unrealized losses on marketable securities		(2)		(2)
Other comprehensive loss		(2)		(2)
Comprehensive loss	$ (1,307)	$ (513)	$ (6,159)	$ (8,467)
Basic net income (loss) per common share	$ 422.95	$ (637.05)	$ 433.33	$ (3,098.31)
Weighted average common shares outstanding used to calculate basic net income (loss) per common share	101,358	5,792	38,027	5,787
Diluted net loss per common share	$ (1.79)	$ (637.50)	$ (8.94)	$ (3,098.31)
Weighted average common shares outstanding used to calculate diluted net loss per common share	731,970	5,792	688,825	5,787