Note 14 - Employee Benefits - Option Activity (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Balance, shares (in shares) | shares	939,193
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 13.78
Granted, shares (in shares) | shares	68,000
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 20.00
Exercised, shares (in shares) | shares	(151,594)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 10.68
Forfeited, shares (in shares) | shares	(13,270)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 15.73
Balance, shares (in shares) | shares	842,329
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 14.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | shares	523,677
Exercisable at December 31, 2018, weighted average exercise price (in dollars per share) | $ / shares	$ 12.69