Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Stockholders' equity:
Series A Preferred stock, par value	$ 0.01	$ 0.01
Series A Preferred stock, authorized shares	10,000,000	10,000,000
Series A Preferred stock, issued shares	0	0
Series A Preferred stock, outstanding shares	0	0
Series B Preferred stock, par value	$ 0.01	$ 0.01
Series B Preferred stock, authorized shares	10,000,000	10,000,000
Series B Preferred stock, issued shares	750,000	750,000
Series B Preferred stock, outstanding shares	750,000	750,000
Series B liquidation preference	$ 900,000	$ 892,500
Series C Preferred stock, par value	$ 0.01	$ 0.01
Series C Preferred stock, authorized shares	10,000,000	10,000,000
Series C Preferred stock, issued shares	177,904	177,904
Series C Preferred stock, outstanding shares	177,904	177,904
Series C liquidation preference	$ 97,847	$ 97,847
Series D Preferred stock, par value	$ 0.01	$ 0.01
Series D Preferred stock, authorized shares	10,000,000	10,000,000
Series D Preferred stock, issued shares	1,751,005	1,751,005
Series D Preferred stock, outstanding shares	1,751,005	1,751,005
Series D liquidation preference	$ 4,837,880	$ 4,796,731
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	90,000,000	90,000,000
Common stock, issued shares	66,216,278	66,027,453
Common stock, outstanding shares	66,216,278	66,027,453