7. Common Stock (Details 3)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Equity [Abstract]
Balance of employee non-vested stock options outstanding	2,461,000	936,000	445,000
Stock options granted	361,000	2,000,000	491,000
Stock options vested	(600,000)	(445,000)	0
Stock options forfeited	(75,000)	(30,000)	0
Balance of employee non-vested stock options outstanding	2,147,000	2,461,000	936,000