Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Significant Accounting Policies [Line Items]
Research and development expenditures	$ 500,000	$ 500,000	$ 500,000
Statutory income tax rate	27.00%	27.00%	28.00%
Available for sale securities	$ 0	$ 0
Change in equity securities fair value	0	0	$ 0
Total held to maturity investments	$ 0	$ 0
South Africa [Member]
Significant Accounting Policies [Line Items]
Statutory income tax rate	27.00%	27.00%	28.00%

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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