Acquisitions (Details 1) (USD $)	Dec. 28, 2012 Neuro Nexus Technologies Inc [Member]	Dec. 30, 2011 Micro Power Electronics Inc [Member]
Business Acquisition [Line Items]
Current assets	$ 618,000	$ 25,620,000
Property, plant and equiptment	35,000	1,650,000
Amortizing intangible assets	2,927,000	28,914,000
Indefinite-lived intangible assets	540,000
Goodwill	8,875,000	31,891,000
Other assets	1,576,000	94,000
Total assets acquired	14,571,000	88,169,000
Current liabilities	420,000	13,679,000
Deferred income taxes	940,000
Long-term liabilities		2,688,000
Total liabilities assumed	1,360,000	16,367,000
Net assets acquired	13,211,000	71,802,000
Inventory Stepup		$ 700,000