Stock-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended			6 Months Ended			3 Months Ended		12 Months Ended	1 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2012 Stock options	Jun. 30, 2011 Stock options	Jun. 30, 2012 Stock options	Jun. 30, 2011 Stock options	Dec. 31, 2011 Stock options	Jun. 30, 2012 Stock options High end of range	Dec. 31, 2011 Stock options High end of range	Jun. 30, 2012 Stock options Low end of range	Dec. 31, 2011 Stock options Low end of range	Jun. 30, 2012 2005 Plan Non-employee directors	Jun. 30, 2012 2005 Plan Non-employee directors	Jun. 30, 2012 2005 Plan Non-qualified stock options	Jun. 30, 2012 2005 Plan Stock options	Jun. 30, 2012 2005 Plan Stock options Non-employee directors	Jun. 30, 2012 2005 Plan Stock options Non-employee directors (other than the Chairman of the Board) item	Jun. 30, 2012 2005 Plan Stock options Chairman of the Board item	Mar. 31, 2011 2005 Plan Stock options Terminated employees	Jun. 30, 2012 2005 Plan Stock options Employees	Dec. 31, 2011 2005 Plan Stock options Employees	Jun. 30, 2012 2005 Plan Restricted common stock	Mar. 31, 2012 2005 Plan Restricted common stock	Jun. 30, 2012 2005 Plan Restricted common stock	Jun. 30, 2012 2005 Plan Restricted common stock	Jun. 30, 2012 Stock Purchase Plan
Stock-Based Compensation
Exercise price of non-qualified stock options relative to fair market value on the grant date (as a percent)												85.00%
Annual grant once initial grant vests (in shares)															22,500
Vesting period										1 year								3 years
Vesting period														3 years
Number of equal quarterly installments															4	4
Options cancelled (in shares)			475,000														173,000
Exercise price of options cancelled (in dollars per share)			$ 0.24														$ 0.24
Exercise price of options granted (in dollars per share)			$ 0.17														$ 0.24
Stock compensation expense	$ 32,000	$ 63,000	$ 53,000	$ 93,000													$ 2,000					$ 40,000	$ 246,000
Shares issued in exchange for certain investor relations and relating consulting services																				208,334	625,000
Period for which shares are restricted from being sold from the date of issuance																							6 months
Number of shares of common stock available to be granted													674,156
Number of Options
Outstanding at the beginning of the period (in shares)			5,602,000
Granted (in shares)			468,000								112,500					45,000	173,000	355,000	565,000
Granted (in shares)														45,000
Expired (in shares)			(3,000)
Forfeited (in shares)			(475,000)														(173,000)
Outstanding at the end of the period (in shares)	5,592,000		5,592,000		5,602,000
Exercisable at the end of the period (in shares)	4,404,000		4,404,000
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 0.21
Granted (in dollars per share)			$ 0.17														$ 0.24
Expired (in dollars per share)			$ 0.55
Forfeited (in dollars per share)			$ 0.24														$ 0.24
Outstanding at the end of the period (in dollars per share)	$ 0.21		$ 0.21		$ 0.21
Exercisable at the end of the period (in dollars per share)	$ 0.21		$ 0.21
Average Remaining Contractual Life (Years)
Outstanding at the end of a period, Average Remaining Contractual Life			3 years 7 months 13 days
Exercisable at the end of a period, Average Remaining Contractual Life			2 years 7 months 6 days
Aggregate Intrinsic Value
Outstanding at the end of a period, Aggregate Intrinsic Value	96,975,000		96,975,000
Exercisable at the end of a period, Aggregate Intrinsic Value	64,833,000		64,833,000
Total unrecognized compensation cost related to unvested options	$ 88,000		$ 88,000
Weighted average period for recognition of unrecognized compensation cost			1 year 9 months 29 days
Weighted average fair value of options issued (in dollars per share)	$ 0.16	$ 0.08				$ 0.17	$ 0.13	$ 0.12	$ 0.12
Assumptions used
Expected life						6 years	6 years	5 years	1 year
Risk-free interest rate, minimum (as a percent)			0.19%		2.20%
Risk-free interest rate, maximum (as a percent)			0.69%		2.65%
Volatility, minimum (as a percent)			204.10%		116.70%
Volatility, maximum (as a percent)			216.20%		121.60%
Value of options granted (in dollars per share)	$ 0.16	$ 0.08				$ 0.17	$ 0.13	$ 0.12	$ 0.12
Period of intervals for purchase of shares of common stock by all eligible employees																								6 months
Share purchase price as percentage of average of closing bid and ask prices																								95.00%
Value of shares as a percent of gross compensation																								10.00%
Shares reserved for future issuance																								294,461