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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Dec. 31, 2017
Income Taxes (Textual)      
Effective tax rate 0.74% 1.29%  
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%  
Repatriation tax, description   The deemed inclusion from the repatriation tax increased from $3.9 million at the time of provision to $5.0 million at the time the calculation was finalized for the 2018 tax return.  
Tax expense $ 6,000 $ 10,000