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Significant Accounting Policies, Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 21, 2015
Earnings (loss) per share [Abstract]
Net loss	$ (2,431)us-gaap_NetIncomeLoss	$ (482)us-gaap_NetIncomeLoss
Basic [Abstract]
Weighted-average shares of common stock outstanding (in shares)	54,237,000	53,313,000
Shares used in computing basic loss per share (in shares)	54,237,000	53,313,000
Basic loss per share (in dollars per share)	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic
Diluted [Abstract]
Weighted-average shares of common stock outstanding (in shares)	54,237,000	53,313,000
Add: Common equivalent shares outstanding (in shares)	0	0
Shares used in computing diluted loss per share (in shares)	54,237,000	53,313,000
Diluted loss per share (in dollars per share)	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common shares outstanding excluded from computation of diluted loss per share (in shares)	5,571,000	6,781,000
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common shares outstanding excluded from computation of diluted loss per share (in shares)	3,711,000	5,139,000
Stock Option [Member] \| Subsequent Event [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issued (in shares)			162,000
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common shares outstanding excluded from computation of diluted loss per share (in shares)	1,370,000	1,152,000
Restricted Stock Units (RSUs) [Member] \| Subsequent Event [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issued (in shares)			397,000
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common shares outstanding excluded from computation of diluted loss per share (in shares)	490,000	490,000