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Stockholders' Equity - Warrant Valuation Assumptions (Details) - $ / shares
12 Months Ended
Apr. 03, 2014
Dec. 31, 2013
IPO    
Class of Stock [Line Items]    
IPO price per share $ 7.00  
Warrants    
Class of Stock [Line Items]    
Expected dividends 0.00% 0.00%
Volatility   45.00%
Warrants | Minimum [Member]    
Class of Stock [Line Items]    
Risk-free interest rate 0.13% 0.33%
Volatility 40.00%  
Warrants | Maximum [Member]    
Class of Stock [Line Items]    
Risk-free interest rate 2.73% 2.60%
Volatility 50.00%  
Warrants | Series A-2 Convertible Preferred Stock    
Class of Stock [Line Items]    
Fair value of stock $ 1.75 $ 2.69
Warrants | Series D-2 Convertible Preferred Stock    
Class of Stock [Line Items]    
Fair value of stock 1.75 $ 2.81
Warrants | Common Stock    
Class of Stock [Line Items]    
Fair value of stock $ 7