Note 5 - Stock-based Compensation - Restricted Stock Units RSUs (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Outstanding (in shares) | shares	246,993
Outstanding (in dollars per share) | $ / shares	$ 18.35
Granted (in shares) | shares	182,811
Granted (in dollars per share) | $ / shares	$ 15.43
Converted (in shares) | shares	(119,448)
Converted (in dollars per share) | $ / shares	$ 18.32
Forfeited (in shares) | shares	(17,107)
Forfeited (in dollars per share) | $ / shares	$ 17.55
Outstanding (in shares) | shares	293,249
Outstanding (in dollars per share) | $ / shares	$ 16.59
Outstanding (Year)	1 year 3 days
Outstanding | $	$ 3,375