The Company and Significant Accounting Policies (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Numerator:
Net income (loss) applicable to common stockholders	$ 2,066	$ (352)	$ (1,329)	$ (4,784)
Denominator:
Weighted average common shares outstanding	85,837,846	85,053,417	85,821,963	85,046,396
Per share:
Net income (loss) per share applicable to common stockholders	$ 0.02	$ 0.00	$ (0.02)	$ 0.06
Numerator:
Net income (loss) applicable to common stockholders	$ 2,066	$ (352)	$ (1,329)	$ (4,784)
Denominator:
Weighted average common shares outstanding	85,837,846	85,053,417	85,821,963	85,046,396
Dilutive securities:
Stock options and restricted stock units	340,485
Diluted shares outstanding	86,178,331	85,053,417	85,821,963	85,046,396
Per share:
Net income (loss) per share applicable to common stockholders	$ 0.02	$ 0.00	$ (0.02)	$ 0.06