CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Series B common stock
Common stock, par value	$ 0.02	$ 0.02
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	49,998	49,998
Common stock, shares outstanding	49,998	49,998
Common stock
Common stock, par value	$ 0.02	$ 0.02
Common stock, shares authorized	149,900,000	149,900,000
Common stock, shares issued	49,841,698	47,803,619
Common stock, shares outstanding	49,799,198	47,761,119
Common stock, treasury	42,500	42,500