Note 10 - Shareholders' Equity - Stock Option Activity (Details) - $ / shares	Dec. 31, 2023		Dec. 31, 2022
Stock options outstanding and exercisable (in shares)	23,176		28,122
Stock options outstanding and exercisable, exercise price (in dollars per share)	$ 38.92	[1]	$ 54.03

[1] Represents the weighted average price.