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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2018
Mar. 31, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]      
Valuation allowance     $ 15,500
increase (decrease) in valuation allowance $ (11,500)    
Deferred tax assets, net $ 18,663 $ 599