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Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Current:            
Federal        
State and local         228,972
Total current provision         228,972
Deferred:            
Federal        
State and local        
Total deferred provision        
Total provision $ 15,500 $ 15,500 $ 228,972