Commitments and Contingencies (Details Textual) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Outstanding liability for restructuring plans	$ 6,210,000	$ 14,224,000	$ 4,343,000	$ 5,027,000
Purchase Obligation	47,200,000
General Period of Warranty on Sales of Hardware Products	90 days
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Outstanding liability for restructuring plans	$ 1,267,000	$ 3,552,000	$ 4,343,000	$ 4,976,000