CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Shareholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	34,337,690	33,116,509
Common stock, shares outstanding	31,072,690	29,851,509
Series A Preferred Stock
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,000,000	9,000,000
Preferred stock, shares issued	6,575,815	6,895,815
Preferred stock, shares outstanding	6,575,815	6,895,815
Series B Preferred Stock
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	1,000,000	1,000,000
Preferred stock, shares outstanding	502,160	502,160
Series C Preferred Stock
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	520,000	520,000
Preferred stock, shares issued	520,000	520,000
Preferred stock, shares outstanding	520,000	520,000
Series D Preferred Stock
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	636,400	636,400
Preferred stock, shares issued	590,910	590,910
Preferred stock, shares outstanding	590,910	590,910