Note 3 - Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Total property and equipment	$ 865,222	$ 841,417
Accumulated depreciation and amortization	(641,142)	(606,505)
Total property and equipment, net	224,080	234,912
Equipment and Furnishings [Member]
Total property and equipment	749,617	725,812
Leasehold Improvements [Member]
Total property and equipment	$ 115,605	$ 115,605

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
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-Paragraph 1
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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