Summary of Significant Accounting Policies - Additional Information (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Organization And Basis Of Presentation [Line Items]
Line of credit required to be maintained in bank under facility lease agreement	$ 80,000
Prior to Initial Public Offering | Series A Convertible Preferred Stock
Organization And Basis Of Presentation [Line Items]
Preferred stock dividend per share	$ 0.8181
Prior to Initial Public Offering | Series B Convertible Preferred Stock
Organization And Basis Of Presentation [Line Items]
Preferred stock dividend per share	$ 0.2781
Certificate of Deposit
Organization And Basis Of Presentation [Line Items]
Restricted cash	$ 100,000