Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Net Income (Loss) Per Share [Abstract]

Numerators and denominators of the basic and diluted net income (loss) per share computations

Following is a reconciliation of the denominators of the basic and diluted net income (loss) per share computations:

	Year Ended December 31,
	2011		2010			2009
	(In thousands, except per share amounts)
Net income (loss) (numerator)	$	8,779	$	(4,335	)	$	(24,139	)
Shares calculation (denominator):
Weighted average shares outstanding - basic		115,175		101,487			95,833
Effect of Dilutive Securities:
Potential common stock relating to stock options, restricted stock units and ESPP		1,252		—			—
Weighted averages shares outstanding - diluted		116,427		101,487			95,833
Net income (loss) per share - basic	$	0.08	$	(0.04	)	$	(0.25	)
Net income (loss) per share - diluted	$	0.08	$	(0.04	)	$	(0.25	)