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Note 3 - Shareholder's Equity - Restricted Stock Activity (Details) - Restricted Stock [Member]
 9 Months Ended
Sep. 30, 2025
$ / shares
shares
Outstanding, shares (in shares) | shares 256,675
Outstanding, weighted average grant date price (in dollars per share) | $ / shares $ 4.38
Granted to employees and directors, shares (in shares) | shares 32,330
Granted to employees and directors, weighted average grant date price (in dollars per share) | $ / shares $ 5.11
Vested, shares (in shares) | shares (29,675)
Vested, weighted average grant date price (in dollars per share) | $ / shares $ 5.56
Outstanding, shares (in shares) | shares 259,330
Outstanding, weighted average grant date price (in dollars per share) | $ / shares $ 3.92