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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jun. 30, 2016
Accumulated Other Comprehensive Loss    
Net unrealized loss on short-term investments $ (85) $ (15)
Cumulative foreign currency translation adjustment (85) 1,121
Change in defined benefit pension obligation (2,066) (2,066)
Accumulated other comprehensive loss $ (2,236) $ (960)