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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]        
Federal $ 0 $ 0 $ 0 $ 0
State 0 0 0 0
Tax expense (benefit) $ 0 $ 0 $ 0 $ 0
TRS        
Income Tax Contingency [Line Items]        
Percentage of voting interests of gross deferred tax asset     100.00%