Note 5 - Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Numerator:
Net income	$	14,373	$	11,201	$	36,146	$	25,063
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		40,590		39,592		40,335		39,422
Effect of dilutive securities		1,305		1,097		1,417		1,254
Weighted-average outstanding shares used to compute diluted net income per share		41,895		40,689		41,752		40,676
Net income per share:
Basic	$	0.35	$	0.28	$	0.90	$	0.64
Diluted	$	0.34	$	0.28	$	0.87	$	0.62