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Patents and Other Intangible Assets (Details 1) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Balance at July 1, 2016 $ 3,264,000    
Current Costs 181,000    
Abandonments and Impairments (1,739,000) $ (1,971,000) $ (5,000)
Balance at September 30, 2016 1,706,000 1,706,000  
Duplex [Member]      
Balance at July 1, 2016 1,433,000    
Current Costs 112,000    
Abandonments and Impairments (682,000)    
Balance at September 30, 2016 863,000 863,000  
Electrodynamic Combustion Control [Member]      
Balance at July 1, 2016 1,831,000    
Current Costs 69,000    
Abandonments and Impairments (1,057,000)    
Balance at September 30, 2016 $ 843,000 $ 843,000