Note 17 - Stock-Based Compensation - Options Outstanding (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Number outstanding (in shares) | shares	290,149
Number exercisable (in shares) | shares	234,007
$17.10 to $17.86
Exercise price range, lower range (in dollars per share)	$ 17.10
Exercise price range, upper range (in dollars per share)	$ 17.86
Number outstanding (in shares) | shares	96,500
Weighted average remaining contractual life (Year)	7 months 13 days
Weighted average exercise price options outstanding (in dollars per share)	$ 17.32
Number exercisable (in shares) | shares	96,460
Weighted average exercise price options exercisable (in dollars per share)	$ 17.32
$21.71 to $22.64
Exercise price range, lower range (in dollars per share)	21.71
Exercise price range, upper range (in dollars per share)	$ 22.64
Number outstanding (in shares) | shares	52,716
Weighted average remaining contractual life (Year)	2 years 29 days
Weighted average exercise price options outstanding (in dollars per share)	$ 22.64
Number exercisable (in shares) | shares	52,716
Weighted average exercise price options exercisable (in dollars per share)	$ 22.64
$29.77 to $36.00
Exercise price range, lower range (in dollars per share)	29.77
Exercise price range, upper range (in dollars per share)	$ 36.00
Number outstanding (in shares) | shares	14,212
Weighted average remaining contractual life (Year)	5 years 1 month 28 days
Weighted average exercise price options outstanding (in dollars per share)	$ 36.00
Number exercisable (in shares) | shares	14,212
Weighted average exercise price options exercisable (in dollars per share)	$ 36.00
$40.00 to $41.95
Exercise price range, lower range (in dollars per share)	40.00
Exercise price range, upper range (in dollars per share)	$ 41.95
Number outstanding (in shares) | shares	20,049
Weighted average remaining contractual life (Year)	6 years 21 days
Weighted average exercise price options outstanding (in dollars per share)	$ 40.10
Number exercisable (in shares) | shares	15,515
Weighted average exercise price options exercisable (in dollars per share)	$ 40.13
$42.65 to $48.50
Exercise price range, lower range (in dollars per share)	42.65
Exercise price range, upper range (in dollars per share)	$ 48.50
Number outstanding (in shares) | shares	59,572
Weighted average remaining contractual life (Year)	4 years 9 months 25 days
Weighted average exercise price options outstanding (in dollars per share)	$ 43.86
Number exercisable (in shares) | shares	49,254
Weighted average exercise price options exercisable (in dollars per share)	$ 43.91
$53.87 to $56.26
Exercise price range, lower range (in dollars per share)	53.31
Exercise price range, upper range (in dollars per share)	$ 56.26
Number outstanding (in shares) | shares	47,100
Weighted average remaining contractual life (Year)	8 years 8 months 12 days
Weighted average exercise price options outstanding (in dollars per share)	$ 53.57
Number exercisable (in shares) | shares	5,850
Weighted average exercise price options exercisable (in dollars per share)	$ 53.87