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Income Taxes (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Income Taxes [Abstract]      
Statutory federal rate 21.00%   35.00%
Unrecognized tax benefits $ 0 $ 0  
Amount of interest and penalties 0 0  
Cash payments for income taxes $ 100,000 $ 200,000