CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Preferred stock, par value	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	23,484,783	11,505,039
Common Stock, Shares, Outstanding	23,484,783	11,505,039
Redeemable Convertible Preferred Stock [Member]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	6,176,748
Preferred Stock, Shares Outstanding	0	6,176,748
Temporary Equity, Liquidation Preference	$ 0	$ 19,827,361
Series A Convertible Preferred Stock [Member]
Preferred Stock Shares Designated	6,176,748
Preferred Stock, Shares Issued	4,117,474
Preferred Stock, Shares Outstanding	4,117,474
Series B Convertible Preferred Stock [Member]
Preferred Stock Shares Designated	2,750
Preferred Stock, Shares Issued	1,192
Preferred Stock, Shares Outstanding	1,192