Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
Jun. 30, 2025	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%	27.00%
Change in equity securities fair value	$ 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%	27.00%	28.00%

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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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).

+ References

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

Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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