Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Jun. 30, 2023	Jun. 30, 2022
Property and equipment and intangible assets - U.S.	$ 461,680	$ 445,629
Net operating loss	982	4,904
Capital loss carryover	971	0
Accruals, reserves and other - U.S.	305,808	297,521
Leasing assets	45,105	137,756
Leasing liabilities	(43,259)	(132,732)
Gross deferred tax assets	771,287	753,078
Less valuation allowance	0	0
Total deferred tax assets - U.S.	771,287	753,078
Intangible assets - foreign	(211,406)	(237,844)
Accruals, reserves and other - foreign	(30,883)	(22,709)
Total deferred tax liabilities - foreign	(242,289)	(260,553)
Total net deferred tax assets	$ 528,998	$ 492,525