Note 15 - Share-based Compensation - Stock Option Activity (Details) - Share-Based Payment Arrangement, Option [Member]	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Outstanding (in shares) | shares	456,293
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 2.16
Exercised (in shares) | shares	(80,938)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 2.06
Outstanding as of March 31, 2023 (in shares) | shares	375,355
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 2.18
Stock options exercisable as of March 31, 2023 (in shares) | shares	375,355
Options exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 2.18