Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 7,939	$ 27,285
Short-term investments	11,402
Prepaid expenses and other current assets	1,035	105
Total current assets	20,376	27,390
Property and equipment, net	19	30
Other assets	33	33
Total assets	20,428	27,453
Current liabilities:
Accounts payable	501	287
Accrued compensation and employee benefits	474	636
Accrued clinical trial expenses	236	918
Other accrued liabilities	406	262
Total current liabilities	1,617	2,103
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 shares issued and outstanding	265	265
Additional paid-in capital	290,321	289,894
Accumulated deficit	(271,775)	(264,809)
Total stockholders' equity	18,811	25,350
Total liabilities and stockholders' equity	$ 20,428	$ 27,453