Note 11 - Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended December 31,
	2021		2020		2019
Numerator:
Net income	$	242,023	$	164,375	$	108,839
Denominator:
Weighted-average outstanding shares - basic		45,851		44,840		43,165
Effect of dilutive securities		2,038		2,174		2,598
Weighted-average outstanding shares - diluted		47,889		47,014		45,763
Net income per share:
Basic	$	5.28	$	3.67	$	2.52
Diluted	$	5.05	$	3.50	$	2.38