Note 11 - Stock Compensation Plans - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Options outstanding, beginning of year (in shares)	59,000	59,000
Options cancelled (in shares)	0	0
Options exercised (in shares)	0	0
Options granted (in shares)	0	0
Options outstanding, end of year (in shares)	59,000	59,000
Options available for grant (in shares)	428,702	926,348
Options exercisable (in shares)	59,000	59,000
Exercised, exercise price range (in dollars per share)	$ 0	$ 0
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price (in dollars per share)	17.35	17.35
Granted, weighted average exercise price (in dollars per share)	0	0
Outstanding, exercise price range (in dollars per share)	17.35	17.35
Exercisable, weighted average exercise price (in dollars per share)	17.35	17.35
Minimum [Member]
Exercised, exercise price range (in dollars per share)		1.52
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price (in dollars per share)	3.5	3.5
Outstanding, exercise price range (in dollars per share)	3.5	3.5
Maximum [Member]
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price (in dollars per share)	39.11	39.11
Outstanding, exercise price range (in dollars per share)	$ 39.11	$ 39.11