Note 7 - Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Numerator:
Net income	$	1,761	$	4,824	$	12,711	$	14,107
Denominator:
Basic weighted average common shares outstanding		30,876		30,000		30,648		29,668
Dilutive effect of equity incentive plans		1,203		1,623		1,327		1,530
Diluted weighted average common shares outstanding		32,079		31,623		31,975		31,198
Net income per share:
Basic	$	0.06	$	0.16	$	0.41	$	0.48
Diluted	$	0.05	$	0.15	$	0.40	$	0.45

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Outstanding options		34		60		25		48
Nonvested restricted stock units		—		—		—		1
Employee Stock Purchase Plan		30		—		40		—
Total		64		60		65		49