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Discontinued Operations (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jan. 22, 2018
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Discontinued Operations [Abstract]        
Discontinued Operation, Name Denville      
Sale price of of assets Denville $ 20,000,000      
Earn out provision of discontinued operations 3,000,000      
Proceeds From Divestiture Of Business     $ 1,020,000 $ 15,754,000
Contingent Consideration, Earn-out 3,000,000      
Potential consideration year 2018 2,000,000      
Potential consideration year 2019 $ 1,000,000      
Earnout earned, year 2018   $ 0    
Contingent consideration earnout maximum   $ 1,000,000 1,000,000  
Earn out performance metrics period 2 years      
Proceeds from divestiture of DSI     $ 1,020,000 $ 15,754,000