Property, Plant and Equipment (Details) (USD $)	3 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Mar. 30, 2013	Dec. 29, 2012
Components of property, plant and equipment
Total property, plant and equipment, gross			$ 63,839,000	$ 62,932,000
Accumulated depreciation			(20,901,000)	(19,719,000)
Total property, plant and equipment, net			42,938,000	43,213,000
Property, Plant and Equipment (Details Textual)
Depreciation expense	1,300,000	1,000,000
Land [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross			15,571,000	15,573,000
Building and improvements [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross			19,387,000	19,231,000
Machinery and equipment [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross			23,046,000	21,523,000
Furniture and fixtures [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross			2,261,000	2,228,000
Capital in progress [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross			$ 3,574,000	$ 4,377,000