Note 8 - Restructuring Charges and Exit Costs (Details) (USD $)	3 Months Ended						12 Months Ended								3 Months Ended								15 Months Ended	3 Months Ended
	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jul. 03, 2011	Mar. 30, 2014	Apr. 01, 2012	Mar. 30, 2014 Cost of Sales [Member]	Mar. 31, 2013 Cost of Sales [Member]	Apr. 01, 2012 Cost of Sales [Member]	Mar. 30, 2014 Operating Expense [Member]	Mar. 31, 2013 Operating Expense [Member]	Apr. 01, 2012 Operating Expense [Member]	Apr. 01, 2012 Termination Of OTN And De-Duplication Products [Member] Accelerated Amortization And Depreciation Charges [Member]	Apr. 01, 2012 Property And Equipment [Member] Accelerated Amortization And Depreciation Charges [Member]	Apr. 01, 2012 Lease Contract Termination Costs [Member]	Jul. 03, 2011 Lease Contract Termination Costs [Member]	Apr. 01, 2012 Lease Abandonment Charges [Member]	Apr. 01, 2012 Accelerated Amortization And Depreciation Charges [Member]	Apr. 01, 2012 Termination Of Certain Electronic Design Automated License Agreements [Member]	Apr. 01, 2012 Write Off Of Prepaid Training, Maintenance And License Fees [Member]	Mar. 31, 2013 Costs Associated With The Industrial Research Assistance Program [Member]	Jul. 03, 2011 Inventory Write Off Costs [Member]	Mar. 31, 2013 Industrial Research Assistance Program [Member]
Note 8 - Restructuring Charges and Exit Costs (Details) [Line Items]
Restructuring Charges	$ 300,000	$ 600,000	$ 300,000	$ 900,000	$ 13,900,000	$ 300,000	$ 3,000,000	$ 14,200,000	$ 187,000	$ 301,000	$ 1,312,000	$ 2,827,000	$ 1,253,000	$ 12,913,000				$ 100,000						$ 100,000	$ (500,000)
Restructuring and Related Cost, Number of Positions Eliminated					173
Severance Costs					4,200,000	100,000
Restructuring and Related Cost, Incurred Cost																	7,000,000				3,900,000	2,600,000	500,000
Other Restructuring Costs															1,700,000	200,000			800,000	1,900,000
Payments of Severance Charges								$ 1,400,000