Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock - Summary of Non-Redeemable Convertible Preferred Stock (Details)

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Convertible Preferred Stock - Summary of Non-Redeemable Convertible Preferred Stock (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Sep. 30, 2014
Feb. 20, 2014
Temporary Equity [Line Items]      
Shares authorized 100,000 10,000,000 10,000,000
Shares issued 66,666 0  
Par value $ 0.001 $ 0.001  
Conversion rate 1.01706    
Liquidation preference per share $ 3.750    
Dividend rate 5.00%    
Issue date May 2002    
Prior IPO
     
Temporary Equity [Line Items]      
Shares issued 66,666