Restructuring (Details textual) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended
	Sep. 30, 2012 Employees	Dec. 30, 2012	Apr. 01, 2012	Dec. 30, 2012 Employee Severance [Member]	Sep. 30, 2012 Employee Severance [Member]	Dec. 30, 2012 Facility Closing [Member]	Sep. 30, 2012 Video Processing Product Lines [Member] Employee Retention [Member]	Jul. 01, 2012 Video Processing Product Lines [Member] Employee Retention [Member]	Apr. 01, 2012 Video Processing Product Lines [Member] Employee Retention [Member]	Dec. 30, 2012 Video Processing Product Lines [Member] Employee Retention [Member]	Jul. 01, 2012 Oregon Facility [Member] Employee Retention [Member]
Restructuring Cost and Reserve [Line Items]
Document Period End Date		Dec. 30, 2012
Restructuring expenses				$ 2,000,000	$ 2,200,000		$ 200,000	$ 800,000	$ 3,600,000
Restructuring and Related Cost, Number of Positions Eliminated	51
Restructuring Reserve		438,000	5,198,000			200,000				200,000
Restructuring Reserve, Settled with Cash		$ 7,982,000				$ 200,000	$ 4,600,000				$ 1,000,000