Note 9 - Shareholders' Equity - Activity in Share Repurchase Program (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Shares repurchased (in shares)	145,300		163,300	463,500	163,300
Weighted average price per share (in dollars per share)	$ 1.158		$ 1.475	$ 1.091	$ 1.475
Value of shares repurchased	$ 168,250	$ 337,000	$ 240,793	$ 505,733	$ 240,793

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern 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.

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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