Stockholders' Equity (Narrative) (Details) (USD $)	0 Months Ended			0 Months Ended	12 Months Ended				12 Months Ended					0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended
	Nov. 02, 2012	Dec. 31, 2013	Dec. 31, 2012	Nov. 02, 2012 Amended And Restated Rights Agreement	Dec. 31, 2013 Stock Option Plan - 1990	Dec. 31, 2012 Stock Option Plan - 1990	Dec. 31, 2011 Stock Option Plan - 1990	Dec. 31, 2010 Stock Option Plan - 1990	Dec. 31, 2013 Equity Plan	Dec. 31, 2012 Equity Plan	Dec. 31, 2011 Equity Plan	Dec. 31, 2010 Equity Plan	Dec. 31, 2013 Equity Plan Maximum	Jun. 20, 2007 Equity Incentive Plan - 2007	Dec. 31, 2013 Equity Incentive Plan - 2007	Dec. 31, 2012 Equity Incentive Plan - 2007	Dec. 31, 2011 Equity Incentive Plan - 2007	Dec. 31, 2010 Equity Incentive Plan - 2007	Jun. 24, 2009 Equity Incentive Plan - 2009	Dec. 31, 2013 Equity Incentive Plan - 2009	Dec. 31, 2012 Equity Incentive Plan - 2009	Dec. 31, 2011 Equity Incentive Plan - 2009	Dec. 31, 2010 Equity Incentive Plan - 2009	Dec. 08, 2011 Common Stock December 8, 2011 Charter Amendment Increase [Member] Maximum	Dec. 08, 2011 Common Stock December 8, 2011 Charter Amendment Increase [Member] Minimum	Dec. 08, 2011 Common Stock December 8, 2011 Charter Amendment Limitations And Restrictions [Member] Maximum	Dec. 08, 2011 Common Stock December 8, 2011 Charter Amendment Limitations And Restrictions [Member] Minimum
Percentage of Common Stock Owned	4.99%
Class of Warrant or Right, Exercise Price of Warrants or Rights				0.001
Preferred Stock, Shares Authorized		5,000,000	5,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Preferred Stock, Shares Issued		0	0
Preferred Stock, Shares Outstanding		0	0
Common Stock, Shares Authorized		350,000,000	350,000,000																					350,000,000	200,000,000	150,000,000	75,000,000
Common Stock, Shares, Outstanding		168,660,370	166,490,190
Equity Incentive Plan, Date Established				Nov. 02, 2012					May 01, 2004					Jun. 20, 2007					Jun. 24, 2009
Number of Shares Authorized					460,798								8,000,000		9,000,000					15,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Description					The 1990 Stock Option Plan provides for the grant of options to purchase up to 460,798 shares of the Company's Common Stock to employees, Directors, and Officers of the Company and to consultants, advisors, and other persons whose contributions are important to the success of the Company. The recipients of options granted under the 1990 Stock Option Plan, the number of shares to be converted by each option, and the exercise price, vesting terms, if any, duration and other terms of each option shall be determined by the Company's Board of Directors or, if delegated by the Board, its Compensation Committee.				The Equity Plan effective May 1, 2004, authorizes the grant of non-qualified and incentive stock options, stock appreciation rights, restricted stock and other stock awards. A maximum of 8,000,000 shares of common stock is reserved for potential issuance pursuant to awards under the Equity Incentive Plan. Unless sooner terminated, the Equity Incentive Plan will continue in effect for a period of 10 years from its effective date. The Equity Plan is administered by the Board of Directors. The Equity Incentive Plan provides for awards to be made to such Officers, other key employees, non-employee directors, consultants and advisors of the Company and its subsidiaries as the Board may select.						On June 20, 2007, the Stockholders approved the 2007 Equity Incentive Plan at our Annual Shareholder Meeting. This plan, effective June 1, 2007, authorizes the grant of non-qualified and incentive stock options, stock appreciation rights, restricted stock and other awards. A maximum of 9,000,000 shares of common stock is reserved for potential issuance pursuant to awards under this plan.					On June 24, 2009, the Stockholders approved the 2009 Equity Incentive Plan at our Annual Shareholder Meeting. This plan, effective September 15, 2009, authorizes the grant of non-qualified and incentive stock options, stock appreciation rights, restricted stock and other awards. A maximum of 15,000,000 shares of common stock is reserved for potential issuance pursuant to awards under this plan.
Deferred Compensation Arrangement with Individual, Maximum Contractual Term					10 years and one month				10 years						10 years					10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Period Over Which Options Must Be Exercised					10 years 1 month
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					0	200,000	262,000	262,000	6,480,934	6,630,934	6,640,934	6,640,934			1,550,000	1,550,000	1,550,000	1,550,000		6,708,978	4,688,978	3,189,978	1,879,978
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		0
Options, Grants in Period, Gross					0	0	0		0	0	0				0	0	0			2,020,000	1,499,000	1,310,000