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Supplemental Financial Information - Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss)    
Cumulative foreign currency translation adjustment $ 849 $ 990
Defined benefit pension obligation (1,000) (1,000)
Accumulated other comprehensive loss $ (151) $ (10)