Note 13 - Income Taxes (Details Textual) - USD ($)	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Deferred Tax Assets, Valuation Allowance	$ (0)	$ 24,000
Liability for Uncertainty in Income Taxes, Current	785,000	671,000
Unrecognized Tax Benefits	785,000	671,000	$ 554,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	277,000	$ 250,000
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	0
Tax Credit Carryforward, Amount	3,700,000
Foreign Tax Jurisdiction [Member] | Canada Revenue Agency [Member]
Operating Loss Carryforwards	0
Tax Credit Carryforward, Amount	$ 0