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Note 10 - Income Taxes (Details Textual) - USD ($) | Dec. 31, 2023 | Jun. 30, 2023
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Liability for Uncertainty in Income Taxes, Current | $ 546,000 |
Unrecognized Tax Benefits | 546,000 |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |
Operating Loss Carryforwards | 0 |
Tax Credit Carryforward, Amount | 0 |
Domestic Tax Authority [Member] | Canada Revenue Agency [Member] |  |
Operating Loss Carryforwards | 91,000 |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |
Tax Credit Carryforward, Amount | 0 |
Deferred Tax Assets, Valuation Allowance | $ 24,000 | $ 24,000

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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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