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Share-Based Compensation (Details) - Options [Member]
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Weighted average assumptions for options granted to employees      
Expected term 6 years 6 years 6 years
Expected Volatility 73.20% 75.80% 74.60%
Expected dividends 0.00% 0.00% 0.00%
Risk-free rate 1.40% 1.70% 1.90%