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Property, Plant And Equipment, Net (Summary Of Cost, Accumulated Depreciation And Carrying Amount Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Jun. 30, 2020
Property Plant And Equipment [Line Items]    
Cost $ 46,027 $ 36,180
Accumulated depreciation 38,535 29,524
Carrying amount 7,492 6,656
Computer Equipment [Member]    
Property Plant And Equipment [Line Items]    
Cost 33,476 26,575
Accumulated depreciation 29,662 22,810
Carrying amount 3,814 3,765
Furniture And Office Equipment [Member]    
Property Plant And Equipment [Line Items]    
Cost 7,492 7,732
Accumulated depreciation 6,587 5,101
Carrying amount 905 2,631
Motor Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Cost 5,059 1,873
Accumulated depreciation 2,286 1,613
Carrying amount $ 2,773 $ 260