Fair Value Measurements (Summary Of Investments Measured And Recorded At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	$ 355	$ 1,431
Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	355
Time/Fixed Deposits And Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments		1,431
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	355	1,431
Level 2 [Member] | Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	$ 355
Level 2 [Member] | Time/Fixed Deposits And Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments		$ 1,431