Note 6 - Share-based Compensation - Options Range of Exercise Prices (Details) - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Lower range limit (in dollars per share)	$ 4.07
Upper range limit (in dollars per share)	$ 8.5
Options outstanding, number of outstanding options (in shares)	967,351
Options outstanding, weighted-average remaining contractual life (Year)	3 years 9 months 18 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.95
Options exercisable, number of options exercisable (in shares)	737,972
Options exercisable – weighted average exercise price (in dollars per share)	$ 6.78	$ 7.18
Range One [Member]
Lower range limit (in dollars per share)	4.07
Upper range limit (in dollars per share)	$ 6.51
Options outstanding, number of outstanding options (in shares)	301,804
Options outstanding, weighted-average remaining contractual life (Year)	2 years 11 months 8 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 5.69
Options exercisable, number of options exercisable (in shares)	297,638
Options exercisable – weighted average exercise price (in dollars per share)	$ 5.72
Range Two [Member]
Lower range limit (in dollars per share)	6.84
Upper range limit (in dollars per share)	$ 6.97
Options outstanding, number of outstanding options (in shares)	291,853
Options outstanding, weighted-average remaining contractual life (Year)	4 years 1 month 28 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.88
Options exercisable, number of options exercisable (in shares)	228,453
Options exercisable – weighted average exercise price (in dollars per share)	$ 6.89
Range Three [Member]
Lower range limit (in dollars per share)	7.86
Upper range limit (in dollars per share)	$ 7.86
Options outstanding, number of outstanding options (in shares)	242,780
Options outstanding, weighted-average remaining contractual life (Year)	5 years 11 months 12 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 7.86
Options exercisable, number of options exercisable (in shares)	80,967
Options exercisable – weighted average exercise price (in dollars per share)	$ 7.86
Range Four [Member]
Lower range limit (in dollars per share)	8.25
Upper range limit (in dollars per share)	$ 8.5
Options outstanding, number of outstanding options (in shares)	130,914
Options outstanding, weighted-average remaining contractual life (Year)	1 year 3 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 8.34
Options exercisable, number of options exercisable (in shares)	130,914
Options exercisable – weighted average exercise price (in dollars per share)	$ 8.34