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Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) R in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2022 ZAR (R) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2022 ZAR (R)
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
Retrenchment costs |  |  | $ 6,700,000 | R 103.4 |  | $ 6,700,000 | R 103.4
Reorganization costs (Note 1) | [1] | $ 0 | 5,894,000 |  | $ 0 | 5,894,000 |
Restatement Adjustment [Member] |  |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
Reorganization costs (Note 1) |  |  | $ 42,000 |  |  | $ 42,000 |
[1] | (1) Reorganization costs have been increased by $42,000 and selling, general and administration has been decreased by $42,000 during the three and nine months ended March 31, 2022, to adjust for a misallocation between the two captions.

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