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Capital Stock and Warrants - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 9 Months Ended 1 Months Ended
Aug. 31, 2013
Sep. 29, 2013
Sep. 23, 2012
Dec. 30, 2012
Feb. 26, 2013
Board Of Directors [Member]
Sep. 29, 2013
Non-voting Common Stock [Member]
Dec. 30, 2012
Non-voting Common Stock [Member]
Sep. 29, 2013
Series A Preferred Stock [Member]
Dec. 30, 2012
Series A Preferred Stock [Member]
Sep. 29, 2013
Series B Preferred Stock [Member]
Dec. 30, 2012
Series B Preferred Stock [Member]
Sep. 29, 2013
Series C Preferred Stock [Member]
Dec. 30, 2012
Series C Preferred Stock [Member]
Sep. 29, 2013
Series D Preferred Stock [Member]
Feb. 26, 2013
Series D Preferred Stock [Member]
Dec. 30, 2012
Series D Preferred Stock [Member]
Sep. 29, 2013
Series E Preferred Stock [Member]
Feb. 26, 2013
Series E Preferred Stock [Member]
Dec. 30, 2012
Series E Preferred Stock [Member]
Sep. 29, 2013
Series F Preferred Stock [Member]
Dec. 30, 2012
Series F Preferred Stock [Member]
Class Of Warrant And Capital Stock [Line Items]                                          
Capital stock, authorized   52,683,632   52,683,632                                  
Common stock, authorized   35,500,000   35,500,000   500,000 500,000                            
Common stock, issued   4,351,869   4,233,977   0                              
Common stock, outstanding   4,351,869   4,233,977                                  
Preferred stock, authorized   17,183,632   17,183,632       4,197,377 4,197,377 3,375,221 3,375,221 1,666,668 1,666,668 1,250,000   1,250,000 4,194,366   4,194,366 2,500,000 2,500,000
Preferred stock, issued   16,086,375   16,086,375       3,697,377   3,290,294   1,646,595   1,250,000     4,194,366     2,007,743  
Preferred stock, outstanding   16,086,375   16,086,375       3,697,377   3,290,294   1,646,595   1,250,000     4,194,366     2,007,743  
Preferred stock dividend rate   6.00%                                      
Minimum percentage of liquidation value to be paid   110.00%                                      
Percentage of liquidation value to be paid   Dividends were cumulative, but were payable only upon their redemption or the occurrence of a significant event that would result in a distribution to their holders of less than 110% of the shares' liquidation value                                      
Terms of non-voting Common stock conversion basis ratio   The terms of the non-voting common stock provided that all shares of non-voting common stock would convert into voting common stock on a 1:1 basis immediately prior to the closing of an underwritten IPO or sale of the Company.                                      
Common stock conversion ratio   1                         1.03     1.03      
Stock options issued         59,865                                
Modification of warrants issued 241,704                                        
Recognized stock compensation expense $ 100 $ 2,370 $ 2,320                                    
Cash dividend declared   $ 49,854                                        
Date of cash dividend paid   Oct. 09, 2013