7. Common Stock (Details 3)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Balance of employee non-vested stock options outstanding	2,187,000	2,461,000	936,000
Stock options granted	273,000	401,000	2,000,000
Stock options vested	(1,031,000)	(600,000)	(445,000)
Stock options forfeited	(12,500)	(75,000)	(30,000)
Balance of employee non-vested stock options outstanding	1,416,500	2,187,000	2,461,000