Note 3. Net Income Available to Common Stockholders (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
	(in thousands, except per share data)
Net income available to common stockholders:
Numerator:
Basic:
Net income	$	13,188		$	7,666		$	21,269		$	14,361
Allocation of net income to participating stockholders		(212	)		(2,952	)		(487	)		(8,754	)
Net income available to common stockholders – basic	$	12,976		$	4,714		$	20,782		$	5,607
Diluted:
Net income available to common stockholders – basic	$	12,976		$	4,714		$	20,782		$	5,607
Undistributed earnings re-allocated to common stockholders		9			210			24			484
Net income available to common stockholders – diluted	$	12,985		$	4,924		$	20,806		$	6,091
Denominator:
Basic shares:
Weighted-average shares used in computing basic net income available to common stockholders		49,454			28,941			48,881			18,141
Diluted shares:
Weighted-average shares used in computing basic net income available to common stockholders		49,454			28,941			48,881			18,141
Dilutive effect of stock options using treasury-stock method		2,333			4,190			2,636			3,046
Weighted-average shares used in computing diluted net income available to common stockholders		51,787			33,131			51,517			21,187
Net income per share:
Basic	$	0.26		$	0.16		$	0.43		$	0.31
Diluted	$	0.25		$	0.15		$	0.40		$	0.29

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
Weighted-average:
Shares of redeemable convertible preferred stock		-		11,241		-		18,694
Shares of common stock subject to repurchase		809		3,505		1,146		3,741
Stock options outstanding		1,557		-		1,482		-
Restricted stock units outstanding		146		-		123		-