6. Share-based Compensation (Details 2) (USD $)	3 Months Ended
Mar. 31, 2013
Number of Shares
Outstanding at beginning of year, Shares	20,379,602
Granted, Shares
Exercised, Shares	(355,856)
Forfeited, Shares	(150,000)
Outstanding at March 31, 2013, Shares	19,873,746
Stock options exercisable atMarch 31, 2013, Shares	15,285,695
Wtd. Avg Exercise Price
Outstanding at beginning of year, Wtd. Avg. Shares Exercise Price	$ 0.09
Granted, Wtd. Avg. Shares Exercise Price
Exercised, Wtd. Avg. Shares Exercise Price	$ (0.08)
Forfeited, Wtd. Avg. Shares Exercise Price	$ (0.08)
Outstanding at March 31, 2013, Wtd. Avg. Shares Exercise Price	$ 0.09
Stock options exercisable at March 31, 2013, Wtd. Avg. Shares Exercise Price	$ 0.08

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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