Note 10 - Shareholders' Equity - Share Repurchase Program (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Shares repurchased (in shares)	178,857	0
Total cost of shares repurchased	$ 202,947	$ 0

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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