Note 16 - Stock-Based Compensation - Options Outstanding (Details)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Number outstanding (in shares) | shares	346,678
Number exercisable (in shares) | shares	295,077
$15.50 to $15.65
Exercise price range, lower range (in dollars per share)	$ 15.50
Exercise price range, upper range (in dollars per share)	$ 15.65
Number outstanding (in shares) | shares	57,616
Weighted average remaining contractual life (Year)	3 months
Weighted average exercise price options outstanding (in dollars per share)	$ 15.64
Number exercisable (in shares) | shares	57,616
Weighted average exercise price options exercisable (in dollars per share)	$ 15.64
$17.10 to $18.00
Exercise price range, lower range (in dollars per share)	17.10
Exercise price range, upper range (in dollars per share)	$ 18.00
Number outstanding (in shares) | shares	108,890
Weighted average remaining contractual life (Year)	1 year 6 months 25 days
Weighted average exercise price options outstanding (in dollars per share)	$ 17.32
Number exercisable (in shares) | shares	108,890
Weighted average exercise price options exercisable (in dollars per share)	$ 17.32
$22.64 to $22.64
Exercise price range, lower range (in dollars per share)	22.64
Exercise price range, upper range (in dollars per share)	$ 22.64
Number outstanding (in shares) | shares	53,316
Weighted average remaining contractual life (Year)	3 years 29 days
Weighted average exercise price options outstanding (in dollars per share)	$ 22.64
Number exercisable (in shares) | shares	53,316
Weighted average exercise price options exercisable (in dollars per share)	$ 22.64
$36.00 to $41.95
Exercise price range, lower range (in dollars per share)	36.00
Exercise price range, upper range (in dollars per share)	$ 41.95
Number outstanding (in shares) | shares	36,773
Weighted average remaining contractual life (Year)	6 years 8 months 1 day
Weighted average exercise price options outstanding (in dollars per share)	$ 38.30
Number exercisable (in shares) | shares	23,060
Weighted average exercise price options exercisable (in dollars per share)	$ 38.06
$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	67,908
Weighted average remaining contractual life (Year)	5 years 7 months 17 days
Weighted average exercise price options outstanding (in dollars per share)	$ 43.76
Number exercisable (in shares) | shares	51,995
Weighted average exercise price options exercisable (in dollars per share)	$ 43.80
$53.87 to $56.26
Exercise price range, lower range (in dollars per share)	53.87
Exercise price range, upper range (in dollars per share)	$ 56.26
Number outstanding (in shares) | shares	22,175
Weighted average remaining contractual life (Year)	9 years 2 months 1 day
Weighted average exercise price options outstanding (in dollars per share)	$ 53.89
Number exercisable (in shares) | shares	200
Weighted average exercise price options exercisable (in dollars per share)	$ 53.87