Note 4 - Segment Reporting (Details Textual)	3 Months Ended
Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Number of Operating Segments	3
Total segment revenues	$ 165,762	$ 181,918
Intersegment Eliminations [Member]
Total segment revenues	$ 0	$ 0

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details