Equity (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Summary of stock options outstanding
Stock Options Outstanding, Beginning Balance	44,529	51,353
Stock Options, granted	26,554	2,000
Stock Options, exercised		(184)
Stock Options, forfeited, or expired	(1,066)	(7,089)
Stock Options Outstanding, Ending Balance	70,017	46,080
Stock Options, Vested and expected to vest at ending balance	63,204	41,656
Stock Options Exercisable at ending balance	38,793	21,411
Weighted Average Exercise Price, Beginning Period	$ 0.05	$ 0.09
Weighted Average Exercise Price, Granted	$ 0.04	$ 0.06
Weighted Average Exercise Price, Exercised		$ 0.07
Weighted Average Exercise Price, Forfeited, or expired	$ 0.13	$ 0.26
Weighted Average Exercise Price, Ending Period	$ 0.05	$ 0.06
Weighted Average Exercise Price, Vested and expected to vest at ending balance	$ 0.05	$ 0.06
Weighted Average Exercise Price, Exercisable at ending balance	$ 0.05	$ 0.07	$ 0.05
Weighted Average Remaining Contractual Term, ending balance	5 years 2 months 12 days	5 years 3 months 18 days
Weighted Average Remaining Contractual Term, vested and expected to vest at ending balance	5 years 2 months 12 days	5 years 3 months 18 days
Weighted Average Remaining Contractual Term, excercisable at ending balance	4 years 8 months 12 days	4 years 10 months 24 days
Aggregate Intrinsic Value, Beginning Balance		$ 4,449
Aggregate Intrinsic Value, Granted		120
Aggregate Intrinsic Value, Exercised		(2)
Aggregate Intrinsic Value, Forfeited or expired		(1,830)
Aggregate Intrinsic Value, Ending Balance		2,237
Aggregate Intrinsic Value, Vested and expected to vest at ending balance		2,465
Aggregate Intrinsic Value, Exercisable at ending balance		$ 1,603