Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Components of property, plant and equipment
Total property, plant and equipment, gross	$ 62,932,000	$ 52,255,000
Accumulated depreciation	(19,719,000)	(16,734,000)
Total property, plant and equipment, net	43,213,000	35,521,000
Property, Plant and Equipment (Textual) [Abstract]
Depreciation expense	4,800,000	3,300,000	2,800,000
Land [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross	15,573,000	15,570,000
Building and improvements [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross	19,231,000	19,191,000
Machinery and equipment [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross	21,523,000	14,693,000
Furniture and fixtures [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross	2,228,000	2,285,000
Capital in progress [Member]
Components of property, plant and equipment
Total property, plant and equipment, gross	$ 4,377,000	$ 516,000