Related Party Transactions (Details) (USD $)	12 Months Ended	0 Months Ended		12 Months Ended	0 Months Ended
	Dec. 28, 2013	Oct. 17, 2013 Energy Micro	Jul. 01, 2013 Energy Micro	Dec. 28, 2013 Mr. Bock	Jul. 01, 2013 Mr. Forre Energy Micro	Oct. 17, 2013 Mr. Bogen Energy Micro
Related Party Transaction
Amount paid to related party	$ 1,500,000			$ 0
Beneficial ownership percentage					32.00%	2.00%
Initial consideration		107,400,000	107,400,000		35,000,000	900,000
Holdback amount related to potential indemnification claims		20,300,000	20,300,000		6,500,000	400,000
Contingent consideration		33,300,000	33,300,000		10,500,000	700,000
Investment in acquired entity by related party prior to the acquisition						$ 800,000