Preferred Stock Warrants (Details)	Dec. 31, 2013 $ / shares shares
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share) | $ / shares	$ 6.10
Series A Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	19,675
Series B Redeemable Convertible Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	56,839