Note 5 - Property, Plant and Equipment - Property and Equipment Summary (Details) - USD ($)	Jun. 30, 2023	Jun. 30, 2022
Solar energy system	$ 134,970	$ 138,030
Total property, plant and equipment, gross	3,273,711	3,252,524
Accumulated depreciation	(2,018,409)	(1,860,630)
Total property, plant and equipment, net	1,255,302	1,391,894
Plant and Equipment [Member]
Plant and equipment, gross	1,914,568	1,905,921
Furniture and Fixtures [Member]
Plant and equipment, gross	287,344	254,616
Land and Building [Member]
Plant and equipment, gross	574,744	590,662
Vehicles [Member]
Plant and equipment, gross	$ 362,085	$ 363,295

Amount, before accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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