Condensed Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized	5,000,000	0
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	150,000,000	132,000,000
Common stock, issued	15,297,794	15,297,794
Common stock, outstanding		493,200
Series A Convertible Preferred Stock
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, authorized	0	68,837,703
Convertible preferred stock, issued	0	68,837,703
Convertible preferred stock, outstanding	0	68,837,703
Series B Convertible Preferred Stock
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, authorized	0	37,830,473
Convertible preferred stock, issued	0	34,129,571
Convertible preferred stock, outstanding	0	34,129,571