Shareholders' Equity, Stock Plans and Preferred Stock (Schedule of Wieghted Average Grant Date Fair Value and Total Intrinsic Value of Exercises) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average grant date fair value	$ 2.29	$ 2.19	$ 2.61
Total intrinsic value of exercises	$ 12	$ 87	$ 192