Note 5 - Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

	Three Months Ended March 31,
	2016		2015
Numerator:
Net income	$	10,575	$	5,963
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		40,028		39,105
Effect of dilutive securities		1,618		1,491
Weighted-average outstanding shares used to compute diluted net income per share		41,646		40,596
Net income per share:
Basic	$	0.26	$	0.15
Diluted	$	0.25	$	0.15