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Taxes - Significant components of deferred tax assets (Details) - USD ($) | Jun. 30, 2025 | Jun. 30, 2024
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance | $ (6,534,073) | $ (6,500,758)
UNITED STATES |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax assets | 6,480,712 | 6,408,628
CANADA |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax assets | $ 53,361 | 53,134
SINGAPORE |  |
Operating Loss Carryforwards [Line Items] |  |
Deferred tax assets |  | $ 38,996

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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