Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Income Taxes [Abstract]    
Uncertain tax benefit positions that would reduce the effective income tax rate if recognized $ 33,000  
Effective tax rate 0.10% (0.80%)
Federal tax rate 21.00%  
Foreign net operating loss carry-forwards and credits $ 0  
Foreign income taxes, net of foreign tax credits (8.20%)  
Uncertain tax positions $ 0