Significant Accounting Policies, Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings (loss) per share:
Net income (loss)	$ (482)	$ 1,882
Basic [Abstract]
Weighted-average shares of common stock outstanding (in shares)	53,313,000	50,085,000
Shares used in computing basic earnings (loss) per share (in shares)	53,313,000	50,085,000
Basic earnings (loss) per share (in dollars per share)	$ (0.01)	$ 0.04
Diluted [Abstract]
Weighted-average shares of common stock outstanding (in shares)	53,313,000	50,085,000
Add: Common equivalent shares outstanding (in shares)	0	2,056,000
Shares used in computing diluted earnings (loss) per share (in shares)	53,313,000	52,141,000
Diluted earnings (loss) per share (in dollars per share)	$ (0.01)	$ 0.04
Options and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings (loss) per share (in shares)	371,000
Stock Options and Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average stock options excluded from computation of diluted earnings (loss) per share (in shares)	3,200,000	2,600,000