Condensed Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash	$ 36,271	$ 7,005
Prepaid expenses	450	93
Other current assets	18	67
Total current assets	36,739	7,165
Property and equipment, net of accumulated depreciation of $276 and $268 at June 30, 2014 and December 31, 2013, respectively	28	36
License agreements, net of accumulated amortization of $1,453 and $1,406 at June 30, 2014 and December 31, 2013, respectively	47	93
Other assets	33
Total assets	36,847	7,294
Current liabilities:
Accounts payable	849	476
Accrued compensation and benefits	764	116
Accrued research and development	152	317
Accrued other	183	342
Total current liabilities	1,948	1,251
Commitments and contingencies
Stockholders' equity
Preferred stock, $.01 par value, 15,000 shares authorized; No shares issued and outstanding	0	0
Common stock, $.01 par value, 70,000 shares authorized; 20,702 and 5,586 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	207	56
Additional paid-in capital	279,759	244,495
Accumulated deficit	(245,067)	(238,508)
Total stockholders' equity	34,899	6,043
Total liabilities and stockholders' equity	$ 36,847	$ 7,294