Stock Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Stock options
Stock Based Compensation
Stock compensation expense	$ 80,000	$ 148,000
Number of Options
Outstanding at the beginning of the period (in shares)	5,602,000	5,529,000
Granted (in shares)	468,000	1,500,000
Forfeited (in shares)	(3,000)	(1,254,000)
Cancelled (in shares)	(475,000)	(173,000)
Outstanding at the end of the period (in shares)	5,592,000	5,602,000
Exercisable at the end of the period (in shares)	4,948,000
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 0.21	$ 0.21
Granted (in dollars per share)	$ 0.17	$ 0.15
Forfeited (in dollars per share)	$ 0.55	$ 0.23
Cancelled (in dollars per share)	$ 0.24	$ 0.24
Outstanding at the end of the period (in dollars per share)	$ 0.21	$ 0.21
Exercisable at the end of the period (in dollars per share)	$ 0.21
Average Remaining Contractual Life (Years)
Outstanding at the end of a period, Average Remaining Contractual Life	3 years 2 months 16 days
Exercisable at the end of a period, Average Remaining Contractual Life	2 years 5 months 8 days
Aggregate Intrinsic Value
Outstanding at the end of a period, Aggregate Intrinsic Value	6,500,000
Exercisable at the end of a period, Aggregate Intrinsic Value	5,500,000
Total unrecognized compensation cost related to unvested options	64,000
Weighted average period for recognition of unrecognized compensation cost	1 year 8 months 5 days
Weighted average fair value of options issued (in dollars per share)	$ 0.16	$ 0.10
Assumptions used
Interest rate, minimum (as a percent)	0.19%	0.27%
Interest rate, maximum (as a percent)	0.69%	2.65%
Volatility, minimum (as a percent)	204.10%	107.20%
Volatility, maximum (as a percent)	216.20%	169.00%
Expected dividend yield (as a percent)	0.00%	0.00%
Value of options granted (in dollars per share)	$ 0.16	$ 0.10
Stock options | High end of range
Aggregate Intrinsic Value
Weighted average fair value of options issued (in dollars per share)	$ 0.17	$ 0.13
Assumptions used
Expected life	6 years	6 years
Value of options granted (in dollars per share)	$ 0.17	$ 0.13
Stock options | Low end of range
Aggregate Intrinsic Value
Weighted average fair value of options issued (in dollars per share)	$ 0.12	$ 0.01
Assumptions used
Expected life	5 years	1 year
Value of options granted (in dollars per share)	$ 0.12	$ 0.01
2005 Plan | Stock options
Stock Based Compensation
Number of shares of common stock available to be granted	674,156
2005 Plan | Stock options | Non-employee directors
Stock Based Compensation
Vesting period	3 years
Number of equal quarterly installments	4
Vesting period	1 year	1 year
Number of Options
Granted (in shares)	112,500	112,500
2005 Plan | Stock options | Chairman of the Board
Stock Based Compensation
Number of equal quarterly installments	4
Number of Options
Granted (in shares)	45,000
2005 Plan | Stock options | Terminated employees
Stock Based Compensation
Stock compensation expense		2,000
Number of Options
Granted (in shares)		173,000
Cancelled (in shares)		(173,000)
Weighted Average Exercise Price
Granted (in dollars per share)		$ 0.24
Cancelled (in dollars per share)		$ 0.24
2005 Plan | Stock options | Employees
Stock Based Compensation
Vesting period	3 years
Number of Options
Granted (in shares)	355,000	350,000
2005 Plan | Stock options | Non-employees
Number of Options
Granted (in shares)		300,000
2005 Plan | Stock options with performance-based vesting | Employees
Number of Options
Granted (in shares)		565,000
2005 Plan | Non-qualified stock options | Low end of range
Stock Based Compensation
Exercise or purchase price relative to market values (as a percent)	85.00%
2005 Plan | Restricted common stock | Garden State and JFS
Stock Based Compensation
Stock compensation expense	$ 464,000
Shares issued in exchange for certain investor relations and relating consulting services	2,083,338
Period for which shares are restricted from being sold from the date of issuance	6 months
Stock Purchase Plan
Stock Based Compensation
Exercise or purchase price relative to market values (as a percent)	95.00%
Assumptions used
Period of intervals for purchase of shares of common stock by all eligible employees	6 months
Value of shares as a percent of gross compensation	10.00%
Shares reserved for future issuance	294,461
Activity in period (in shares)	0	0