Equity (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Summary of stock options outstanding
Stock Options Outstanding, Beginning Balance	44,529	51,353
Stock Options, granted	26,554	1,500
Stock Options, exercised		(153)
Stock Options, forfeited, or expired	(610)	(4,797)
Stock Options Outstanding, Ending Balance	70,473	47,903
Stock Options, Vested and expected to vest at ending balance	63,615	43,276
Stock Options Exercisable at ending balance	33,083	18,649
Weighted Average Exercise Price, Beginning Period	$ 0.05	$ 0.09
Weighted Average Exercise Price, Granted	$ 0.04	$ 0.06
Weighted Average Exercise Price, Exercised		$ 0.06
Weighted Average Exercise Price, Forfeited, or expired	$ 0.14	$ 0.34
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	$ 0.08
Weighted Average Remaining Contractual Term, ending balance	5 years 6 months 4 days	5 years 5 months 19 days
Weighted Average Remaining Contractual Term, vested and expected to vest at ending balance	5 years 6 months 4 days	5 years 5 months 19 days
Weighted Average Remaining Contractual Term, excercisable at ending balance	4 years 11 months 8 days	5 years 1 month 6 days
Aggregate Intrinsic Value, Beginning Balance	$ 2,230	$ 4,449
Aggregate Intrinsic Value, Granted	1,188	90
Aggregate Intrinsic Value, Exercised		(2)
Aggregate Intrinsic Value, Forfeited or expired	(85)	(1,654)
Aggregate Intrinsic Value, Ending Balance	3,333	2,876
Aggregate Intrinsic Value, Vested and expected to vest at ending balance	3,009	2,598
Aggregate Intrinsic Value, Exercisable at ending balance	$ 1,638	$ 1,531