Financial Instruments (Summary Of Investments Measured And Recorded At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	$ 1,856	$ 1,602
Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	13	23
Time/Fixed Deposits And Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	1,118	854
Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	725	725
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	13	23
Level 1 [Member] | Mutual Funds [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	13	23
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	1,118	854
Level 2 [Member] | Time/Fixed Deposits And Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	1,118	854
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	725	725
Level 3 [Member] | Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Investments	$ 725	$ 725