Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Details)

v2.4.1.9
Property, Plant and Equipment (Details) (USD $)
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 85,973,568us-gaap_PropertyPlantAndEquipmentGross $ 75,154,799us-gaap_PropertyPlantAndEquipmentGross  
Less accumulated depreciation 46,036,102us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 42,489,518us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment  
Property, plant and equipment, net 39,937,466us-gaap_PropertyPlantAndEquipmentNet 32,665,281us-gaap_PropertyPlantAndEquipmentNet  
Depreciation expense 3,724,757us-gaap_Depreciation 3,074,369us-gaap_Depreciation 2,394,298us-gaap_Depreciation
Land [Member]      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 1,742,213us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember 		652,213us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember 		 
Land improvements [Member]      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 714,398us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember 		662,521us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember 		 
Building [Member]      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 21,371,594us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		18,586,308us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		 
Machinery, fixtures and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 56,651,197us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember 		50,239,409us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember 		 
Construction-in-progress [Member]      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 5,494,166us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember 		$ 5,014,348us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember