Note 10 - Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

	Three Months Ended June 30,					Six Months Ended June 30,
	2012		2011			2012		2011
Numerator:
Net income (loss)	$	4,820	$	(101	)	$	8,319	$	(859	)
Denominator:
Basic weighted average common shares outstanding		28,560		28,110			28,472		27,960
Dilutive effect of equity incentive plans		1,000		—			831		—
Diluted weighted average common shares outstanding		29,560		28,110			29,303		27,960
Net income (loss) per share:
Basic	$	0.17	$	(0.00	)	$	0.29	$	(0.03	)
Diluted	$	0.16	$	(0.00	)	$	0.28	$	(0.03	)

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Outstanding options		1,763		1,948		1,835		1,520
Nonvested restricted stock units		21		315		31		202
Employee Stock Purchase Plan		—		64		—		32
Total		1,784		2,327		1,866		1,754