Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Redeemable convertible preferred stock, par value	$ 0.00001	$ 0.00001
Redeemable convertible preferred stock, shares authorized	0	5,500,636
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	175,000,000	14,700,000
Common stock, shares issued	20,262,693	1,383,345
Common stock, shares outstanding	20,262,693	1,383,345
Series A redeemable convertible preferred stock [Member]
Redeemable convertible preferred stock, shares issued	0	734,538
Redeemable convertible preferred stock, shares outstanding	0	734,538
Redeemable convertible preferred stock, liquidation preference		$ 39,367,094
Series B redeemable convertible preferred stock [Member]
Redeemable convertible preferred stock, shares issued	0	1,287,525
Redeemable convertible preferred stock, shares outstanding	0	1,287,525
Redeemable convertible preferred stock, liquidation preference		21,031,365
Series C redeemable convertible preferred stock [Member]
Redeemable convertible preferred stock, shares issued	0	3,302,885
Redeemable convertible preferred stock, shares outstanding	0	3,302,885
Redeemable convertible preferred stock, liquidation preference		$ 97,202,997