Property, Plant And Equipment, Net (Schedule Of Property, Plant And Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Property Plant And Equipment [Line Items]
Cost	$ 36,180	$ 63,654
Accumulated depreciation	29,524	55,427
Carrying amount	6,656	8,227	[1]
Computer Equipment [Member]
Property Plant And Equipment [Line Items]
Cost	26,575	37,719
Accumulated depreciation	22,810	32,707
Carrying amount	3,765	5,012
Furniture And Office Equipment [Member]
Property Plant And Equipment [Line Items]
Cost	7,732	9,788
Accumulated depreciation	5,101	7,738
Carrying amount	2,631	2,050
Vehicles [Member]
Property Plant And Equipment [Line Items]
Cost	1,873	16,147
Accumulated depreciation	1,613	14,982
Carrying amount	$ 260	$ 1,165

[1] Refer to Note 1