Note 10 - Shareholders' Equity - Schedule of Stock Option by Exercise Price (Details)	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Exercise Price Range 1 [Member]
Options outstanding, number of shares (in shares) | shares	16,500
Options Outstanding, lower exercise price range (in dollars per share)	$ 7.2
Options outstanding, upper exercise price range (in dollars per share)	11.6
Options outstanding, weighted average exercise price (in dollars per share)	$ 10
Options outstanding, remaining contractual term (Year)	2 years 9 months 18 days
Options exercisable, number of shares (in shares) | shares	16,500
Options exercisable, weighted average exercise price (in dollars per share)	$ 10
Exercise Price Range 2 [Member]
Options outstanding, number of shares (in shares) | shares	5,676
Options Outstanding, lower exercise price range (in dollars per share)	$ 90
Options outstanding, upper exercise price range (in dollars per share)	90
Options outstanding, weighted average exercise price (in dollars per share)	$ 90
Options outstanding, remaining contractual term (Year)	0 years
Options exercisable, number of shares (in shares) | shares	5,676
Options exercisable, weighted average exercise price (in dollars per share)	$ 90
Exercise Price Range 3 [Member]
Options outstanding, number of shares (in shares) | shares	22,176
Options Outstanding, lower exercise price range (in dollars per share)	$ 7.2
Options outstanding, upper exercise price range (in dollars per share)	90
Options outstanding, weighted average exercise price (in dollars per share)	$ 30.48
Options outstanding, remaining contractual term (Year)	2 years 1 month 6 days
Options exercisable, number of shares (in shares) | shares	22,176
Options exercisable, weighted average exercise price (in dollars per share)	$ 30.48