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Impairment of Goodwill and Intangible Assets (Details)
3 Months Ended 12 Months Ended
Oct. 01, 2016
USD ($)
Dec. 31, 2016
USD ($)
segment
Jan. 02, 2016
USD ($)
segment
Jan. 03, 2015
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Number of operating units | segment   1 2  
Number of reportable segment | segment   1 2  
Impairment of goodwill and intangible assets   $ 7,866,000 $ 21,655,000 $ 0
Impairment $ 7,900,000      
SiliconBlue Technologies Ltd. and Silicon Image, Inc        
Finite-Lived Intangible Assets [Line Items]        
Impairment of goodwill and intangible assets     12,700,000  
Impairment   7,866,000 8,995,000  
SiliconBlue Technologies Ltd. and Silicon Image, Inc | Developed technology        
Finite-Lived Intangible Assets [Line Items]        
Impairment   0 3,856,000  
SiliconBlue Technologies Ltd. and Silicon Image, Inc | Customer relationships        
Finite-Lived Intangible Assets [Line Items]        
Impairment   7,866,000 5,139,000  
Lattice        
Finite-Lived Intangible Assets [Line Items]        
Impairment of goodwill and intangible assets   $ 0 $ 0  
Qterics        
Finite-Lived Intangible Assets [Line Items]        
Goodwill and Intangible Asset Impairment, Percent     92.00%