Note 4 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Number of stock awards (in thousands)			Weighted average grant date fair value
Unvested at December 31, 2020		645		$	16.25
Granted		252		$	21.34
Vested		(218	)	$	16.57
Forfeited		(117	)	$	15.31
Unvested at December 31, 2021		562		$	18.12
Granted		155		$	22.08
Vested		(223	)	$	18.79
Forfeited		(5	)	$	13.94
Unvested at December 31, 2022		489		$	19.12
Granted		98		$	38.71
Vested		(353	)	$	18.47
Forfeited		-		$	-
Unvested at December 31, 2023		234		$	29.20

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Number of options (in thousands)			Weighted average exercise price		Weighted average grant date fair value		Weighted average remaining contractual term	Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2020		721		$	15.77	$	7.26	9.8 years	$	(692	)
Options granted		450		$	21.24	$	9.85
Options exercised		-		$	-	$	-
Options forfeited		(60	)	$	15.77	$	7.26
Outstanding at December 31, 2021		1,111		$	17.99	$	8.31	9.0 years	$	9,382
Options granted		-		$	-	$	-
Options exercised		(24	)	$	15.77	$	4.90
Options forfeited		-		$	-	$	-
Outstanding at December 31, 2022		1,087		$	18.04	$	8.39	8.0 years	$	17,968
Options granted		-		$	-	$	-
Options exercised		(15	)	$	15.77	$	4.90
Options forfeited		-		$	-	$	-
Outstanding at December 31, 2023		1,072		$	18.07	$	8.43	7.0 years	$	29,978
Exercisable at December 31, 2023		238		$	18.35	$	5.52	7.1 years	$	6,600