Shareholders' Equity (Summary Of Outstanding Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Equity [Abstract]
Number of Shares, Outstanding December 31, 2011	4,320,803
Number of Shares, Granted	621,605
Number of Shares, Exercised	(9,427)
Number of Shares, Forfeited	(425,342)
Number of Share, Canceled	(600,929)
Number of Shares, Outstanding December 31, 2012	3,906,710
Number of Shares, Vested and expected to vest at December 31, 2012	3,906,710
Number of Shares, Exercisable at December 31, 2012	2,502,908
Weighted Average Exercise Price Per Share, Outstanding at December 31, 2011	$ 16.04
Weighted Average Exercise Price Per Share, Granted	$ 5.78
Weighted Average Exercise Price Per Share, Exercised	$ 7.67
Weighted Average Exercise Price Per Share, Forfeited	$ 13.63
Weighted Average Exercise Price Per Share, Canceled	$ 19.63
Weighted Average Exercise Price Per Share, Outstanding at December 31, 2012	$ 14.14
Weighted Average Exercise Price Per Share, Vested and expected to vest at December 31, 2012	$ 14.14
Weighted Average Exercise Price Per Share, Exercisable at December 31, 2012	$ 16.98
Weighted Average Remaining Contractual Term (in Years), Outstanding at December 31, 2012	6 years 3 months 7 days
Weighted Average Remaining Contractual Term (in Years), Vested and expected to vest at December 31, 2012	6 years 3 months 7 days
Weighted Average Remaining Contractual Term (in Years), Exercisable at December 31, 2012	6 years 3 months 11 days
Aggregate Intrinsic Value, Outstanding at December 31, 2012	$ 3,000,993	[1]
Aggregate Intrinsic Value, Vested and expected to vest at December 31, 2012	3,000,993	[1]
Aggregate Intrinsic Value, Exercisable at December 31, 2012	$ 434,726	[1]

[1] The aggregate intrinsic value in the table above is the amount by which the market value of the underlying stock exceeded the exercise price of outstanding options, before applicable income taxes; and represents the amount the option holder would have realized if all in-the-money options had been exercised on the last business day of the period indicated.