CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
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	62,450,724	53,879,348
Common stock, shares outstanding	62,450,724	53,879,348
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	3,565,815	5,405,815
Preferred stock, shares outstanding	3,565,815	5,405,815
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	502,160	502,160
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