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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Income Tax Disclosure [Abstract]          
Current income tax expense (benefit) $ 113 $ 114 $ 221 $ 252  
Deferred tax assets valuation allowance 28,900   28,900   $ 31,700
Deferred tax expense $ 800   $ 1,561 $ 1,299