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Condensed Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Preferred Stock, Par Value (in dollar per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000,000 0
Preferred Stock, shares issued 0 0
Preferred Stock, shares outstanding 0 0
Common Stock, Par Value (in dollar per share) $ 0.001 $ 0.001
Common Stock, share authorized 100,000,000 17,674,419
Common Stock, share issued 9,270,255 3,758,488
Common Stock, share outstanding 9,270,255 3,758,488
Series A Convertible Preferred stock    
Convertible Preferred Stock, Par Value (in dollar per share) $ 0.001 $ 0.001
Convertible Preferred Stock, share authorized 0 2,325,581
Convertible Preferred stock, share issued 0 745,637
Convertible Preferred stock, share outstanding 0 0
Convertible Preferred Stock, liquidation preference $ 0 $ 7,953