INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended		12 Months Ended
	Apr. 01, 2012 Y	Apr. 03, 2011	Jan. 01, 2012 Y
Amortizable intangibles assets
Gross intangibles assets	$ 17,500,000		$ 17,200,000
Accumulated Amortization	11,900,000		11,200,000
Net intangibles assets	5,600,000		6,000,000
Total intangible assets
Gross Intangible Assets	28,900,000		28,600,000
Net Intangible Assets	17,006,000		17,414,000
Weighted Average Life (in years)	11		11
Amortization expenses	500,000	500,000
Amortization of intangible assets	413,000	442,000
Amortization expenses recorded as cost of goods sold	100,000	100,000
Estimated amortization expense related to amortizable intangibles
2012 (nine months)	1,400,000
2013	1,800,000
2014	1,100,000
2015	1,000,000
2016	300,000
Total	5,600,000
Product technology
Amortizable intangibles assets
Gross intangibles assets	5,700,000		5,600,000
Accumulated Amortization	2,200,000		2,000,000
Net intangibles assets	3,500,000		3,600,000
Total intangible assets
Weighted Average Life (in years)	7		7
Customer relationships
Amortizable intangibles assets
Gross intangibles assets	5,500,000		5,300,000
Accumulated Amortization	4,300,000		3,900,000
Net intangibles assets	1,200,000		1,400,000
Total intangible assets
Weighted Average Life (in years)	7		7
Other
Amortizable intangibles assets
Gross intangibles assets	6,300,000		6,300,000
Accumulated Amortization	5,400,000		5,300,000
Net intangibles assets	900,000		1,000,000
Total intangible assets
Weighted Average Life (in years)	17		17
Trade name
Non-amortizable intangibles assets
Net Intangible Assets	$ 11,400,000		$ 11,400,000