Note 11 - Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Year Ended December 31,
	2020		2019		2018
Numerator:
Net income	$	164,375	$	108,839	$	105,268
Denominator:
Weighted-average outstanding shares - basic		44,840		43,165		42,247
Effect of dilutive securities		2,174		2,598		2,355
Weighted-average outstanding shares - diluted		47,014		45,763		44,602
Net income per share:
Basic	$	3.67	$	2.52	$	2.49
Diluted	$	3.50	$	2.38	$	2.36