BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 28,027	$ 49,720
Short-term Investments	4,974
Prepaid expenses and other current assets	1,859	428
Total current assets	34,860	50,148
Property and equipment, net of accumulated depreciation of $364 and $356	36	44
Investments	1,489
Other assets	368	21
Total assets	36,753	50,213
Current liabilities:
Current portion of notes payable	3,127
Accounts payable	2,300	536
Accrued expenses	1,236	1,503
Total current liabilities	6,663	2,039
Notes payable	4,375	7,000
Other long-term liabilities	57	20
Total liabilities	$ 11,095	$ 9,059
Stockholders' equity
Preferred stock, $0.001 par value; 25,000,000 shares authorized, 0 shares issued and outstanding
Common stock, $0.001 par value; 100,000,000 shares authorized, 14,364,083 issued and 14,334,852 outstanding at September 30, 2015 and 14,036,985 issued and 14,007,754 outstanding at December 31, 2014	$ 14	$ 14
Additional paid-in capital	115,217	113,476
Accumulated deficit	(89,573)	(72,336)
Total stockholders’ equity	25,658	41,154
Total liabilities and stockholders’ equity	$ 36,753	$ 50,213