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Property, Plant and Equipment (Details) (USD $)
12 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment $ 28,069,293us-gaap_PropertyPlantAndEquipmentGross $ 29,282,329us-gaap_PropertyPlantAndEquipmentGross  
Accumulated depreciation and amortization (23,479,872)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (23,247,366)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment  
Net property, plant and equipment 4,589,421us-gaap_PropertyPlantAndEquipmentNet 6,034,963us-gaap_PropertyPlantAndEquipmentNet  
Depreciation expense 2,600,000us-gaap_DepreciationDepletionAndAmortization 2,400,000us-gaap_DepreciationDepletionAndAmortization 3,500,000us-gaap_DepreciationDepletionAndAmortization
Minimum      
Property, Plant and Equipment [Line Items]      
Useful Life 3 years    
Maximum      
Property, Plant and Equipment [Line Items]      
Useful Life 10 years    
Land      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment 877,485us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
915,595us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
 
Buildings      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment 2,298,367us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
2,398,188us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
 
Buildings | Maximum      
Property, Plant and Equipment [Line Items]      
Useful Life 10 years    
Equipment      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment 19,696,919us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
20,993,220us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
 
Equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Useful Life 3 years    
Equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Useful Life 5 years    
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment 3,652,395us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
3,441,553us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
 
Furniture and fixtures      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment 886,985us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
910,270us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
 
Furniture and fixtures | Maximum      
Property, Plant and Equipment [Line Items]      
Useful Life 3 years    
Equipment under construction      
Property, Plant and Equipment [Line Items]      
Gross property, plant and equipment $ 657,142us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 623,503us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember