Note 5 - Stock-Based Compensation - Schedule of Unvested Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	3 Months Ended
	Mar. 31, 2023 $ / shares shares
Balance (in shares) | shares	370
Balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 24.77
Granted (in shares) | shares	270
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 22.37
Vested (in shares) | shares	(29)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 25.52
Forfeited (in shares) | shares	(45)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 25.49
Balance (in shares) | shares	566
Balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 23.53