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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Taxes (Textual)        
Income tax expense $ 6 $ 7 $ 19 $ 85
U.S. federal statutory rate     21.00%  
State tax net of federal benefit     6.20%  
U.S. corporate tax rate, prior year tax rate     35.00%  
U.S. corporate tax rate, reduced tax rate     21.00%  
Minimum [Member]        
Income Taxes (Textual)        
Effective tax rate     0.80%  
Maximum [Member]        
Income Taxes (Textual)        
Effective tax rate     2.20%