Note 10 - Net Income Per Share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

10.   NET INCOME PER SHARE

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):

	Year Ended December 31,
	2015		2014		2013
Numerator:
Net income	$	35,172	$	35,495	$	22,898
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		39,470		38,686		37,387
Effect of dilutive securities		1,399		1,107		1,233
Weighted-average outstanding shares used to compute diluted net income per share		40,869		39,793		38,620
Net income per share:
Basic	$	0.89	$	0.92	$	0.61
Diluted	$	0.86	$	0.89	$	0.59

Anti-dilutive common stock equivalents were not material in any of the periods presented.