Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash	$ 33,093	$ 30,031
Prepaid expenses and other current assets	471	322
Total current assets	33,564	30,353
Property and equipment, net of accumulated depreciation of $252 and $242 at June 30, 2015 and December 31, 2014, respectively	42	37
Other assets	33	33
Total assets	33,639	30,423
Current liabilities:
Accounts payable	178	335
Accrued compensation and benefits	545	841
Accrued research and development	188	36
Accrued other	255	207
Total current liabilities	$ 1,166	$ 1,419
Commitments and contingencies
Stockholders' equity
Preferred stock, $ 0.01 par value, 15,000 shares authorized; No shares issued and outstanding
Common stock, $ 0.01 par value, 70,000 shares authorized; 26,545 and 20,705 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	$ 265	$ 207
Additional paid-in capital	289,459	279,952
Accumulated deficit	(257,251)	(251,155)
Total stockholders' equity	32,473	29,004
Total liabilities and stockholders' equity	$ 33,639	$ 30,423