Property and Equipment, Net (Schedule Of Property and Equipment, Net) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 734,000 $ 737,000
Less: accumulated depreciation 727,000 721,000
Property and equipment, net 7,000 16,000
Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 7 years  
Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 3 years  
Manufacturing equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 599,000 602,000
Manufacturing equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 5 years  
Manufacturing equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 3 years  
Research equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 5 years  
Property and equipment, gross 37,000 37,000
Computer equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 59,000 59,000
Computer equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 4 years  
Computer equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 3 years  
Furniture and fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Life 7 years  
Property and equipment, gross $ 39,000 $ 39,000