Equity (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary of stock options outstanding
Stock Options Outstanding, Beginning Balance	44,529	51,353
Stock Options, granted	26,241
Stock Options, exercised		(132)
Stock Options, forfeited, or expired	(500)	(983)
Stock Options Outstanding, Ending Balance	70,270	50,238
Stock Options, Vested and expected to vest at ending balance	70,270	18,510
Stock Options Exercisable at ending balance	27,036	18,510
Weighted Average Exercise Price, Beginning Period	$ 0.05	$ 0.09
Weighted Average Exercise Price, Granted	$ 0.04
Weighted Average Exercise Price, Exercised		$ 0.07
Weighted Average Exercise Price, Forfeited, or expired	$ 0.09	$ 0.06
Weighted Average Exercise Price, Ending Period	$ 0.05	$ 0.09
Weighted Average Exercise Price, Vested and expected to vest at ending balance	$ 0.05	$ 0.09
Weighted Average Exercise Price, Exercisable at ending balance	$ 0.05	$ 0.16
Weighted Average Remaining Contractual Term, ending balance	5 years 8 months 12 days	5 years 5 months 19 days
Weighted Average Remaining Contractual Term, vested and expected to vest at ending balance	5 years 0 months 18 days	5 years 5 months 19 days
Weighted Average Remaining Contractual Term, excercisable at ending balance	5 years 0 months 18 days	4 years 3 months 22 days
Aggregate Intrinsic Value, Beginning Balance	$ 2,230	$ 4,450
Aggregate Intrinsic Value, Granted	1,179
Aggregate Intrinsic Value, Exercised		2
Aggregate Intrinsic Value, Forfeited or expired	43	64
Aggregate Intrinsic Value, Ending Balance	3,367	4,377
Aggregate Intrinsic Value, Vested and expected to vest at ending balance	3,367	2,942
Aggregate Intrinsic Value, Exercisable at ending balance	$ 1,043	$ 2,942