Significant Accounting Policies, Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings (loss) per share:
Outstanding options excluded from earnings per share (in shares)		600,000	1,100,000	1,900,000
Numerator:
Net income (loss)	$ 291	$ (7,110)	$ (6,722)	$ (14,291)
Denominator:
Weighted-average common shares outstanding (in shares)	48,707,000	48,326,000	48,571,000	48,267,000
Effect of dilutive securities:
Weighted average common stock equivalents from assumed exercise of stock options and RSU (in shares)	1,619,000	0	0	0
Shares used in computing diluted net income (loss) per share (in shares)	50,326,000	48,326,000	48,571,000	48,267,000
Basic net income (loss) from continuing operations (in dollars per share)	$ 0.01	$ (0.15)	$ (0.14)	$ (0.3)
Diluted net income (loss) from continuing operations (in dollars per share)	$ 0.01	$ (0.15)	$ (0.14)	$ (0.3)
Basic net income (loss) from discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Diluted net income (loss) from discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Basic net income (loss) per share (in dollars per share)	$ 0.01	$ (0.15)	$ (0.14)	$ (0.3)
Diluted net income (loss) per share (in dollars per share)	$ 0.01	$ (0.15)	$ (0.14)	$ (0.3)
Warranties and Indemnifications [Abstract]
Refund period for channel partners, minimum			5 days
Refund period for channel partners, maximum			14 days
Refund period for guarantee			30 days
Refund period for non channel partners, maximum			5 days