Equity Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Equity Instruments [Abstract]

Schedule of warrant activity

A summary of our warrant activity for the three months ended March 31, 2013 and 2012 follows:

Warrants	Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2013		35,957,583		$	0.33	4.26 years
Granted		1,700,000		$	0.25
Forfeited or expired		(325,000	)	$	0.37
Outstanding at March 31, 2013		37,332,583		$	0.33	4.00 years
Exercisable at March 31, 2013		37,298,583		$	0.33	4.00 years		—
Outstanding at January 1, 2012		41,057,583		$	0.35	4.86 years
Granted		25,000		$	0.25
Forfeited or expired		(100,000	)	$	0.53
Outstanding at March 31, 2012		40,982,583		$	0.35	4.61 years
Exercisable at March 31, 2012		39,315,583		$	0.33	4.67 years		—

Schedule of option activity

A summary of our option activity for the three months ended March 31, 2013 and 2012 follows:

Options	Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2013		6,618,000		$	0.32	8.29 years
Forfeited or expired		(190,000	)	$	0.79
Outstanding at March 31, 2013		6,428,000		$	0.31	8.15 years		—
Exercisable at March 31, 2013		6,091,334		$	0.31	8.11 years		—
Outstanding at January 1, 2012		8,795,400		$	0.33	7.74 years
Forfeited or expired		(40,000	)	$	0.38
Outstanding at March 31, 2012		8,755,400		$	0.33	7.49 years		—
Exercisable at March 31, 20112		8,004,400		$	0.33	7.40 years		—