Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 72,709	$ 14,668
Prepaid expenses and other current assets	591	354
Total current assets	73,300	15,022
Property and equipment, net	216	288
Restricted cash	113	113
Other non-current assets	28	541
Total assets	73,657	15,964
Current liabilities:
Accounts payable	1,783	1,132
Accrued expenses	2,437	2,793
Current portion of notes payable, net of discount	3,191	309
Total current liabilities	7,411	4,234
Deferred rent, net of current portion	39	67
Notes payable, net of current portion and discount	6,549	4,439
Other liability	114	23
Warrant liability		108
Total liabilities	$ 14,113	$ 8,871
Commitments (Note 7)
Stockholders' equity (deficit):
Preferred stock, $0.001 par value per share, 5,000,000 and 0 shares authorized at September 30, 2015 and December 31, 2014, respectively, 0 shares issued and outstanding
Common stock, $0.001 par value, 150,000,000 shares authorized at September 30, 2015 and 132,000,000 shares authorized at December 31, 2014; 15,297,794 and 493,200 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 15	$ 1
Additional paid-in capital	157,933	2,326
Accumulated deficit	(98,404)	(75,380)
Total stockholders' equity (deficit)	59,544	(73,053)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	$ 73,657	15,964
Series A Convertible Preferred Stock
Current liabilities:
Convertible preferred stock, $.0001 par value		47,898
Series B Convertible Preferred Stock
Current liabilities:
Convertible preferred stock, $.0001 par value		$ 32,248