Fair Value Measurements (Summary Of Investments Measured And Recorded At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	$ 427	$ 355
Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	427	355
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	427	355
Level 2 [Member] | Bank Guarantees [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Short-term investments	$ 427	$ 355