Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Undesignated stock, par value	$ 0.01	$ 0.01
Undesignated stock, shares authorized	20,000,000	20,000,000
Undesignated stock, shares designated	20,000,000	20,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	50,000,000
Common stock, issued	41,136,738	35,789,388
Common stock, outstanding	41,136,738	35,789,388
Series C super dividend convertible preferred stock
Convertible preferred stock, shares authorized	1,000	1,000
Convertible preferred stock, shares issued	176	176
Convertible preferred stock, shares outstanding	176	176
Convertible preferred stock, redemption value	$ 7,956,000
Convertible preferred stock, liquidation value	$ 1,760,000
Series A 12% convertible preferred stock
Convertible preferred stock, shares authorized	1,742,500	1,742,500
Convertible preferred stock, issued	1,352,500	1,377,500
Convertible preferred stock, outstanding	1,352,500	1,377,500
Convertible preferred stock, liquidation value	$ 1,352,500
Series B-1 12% convertible preferred stock
Convertible preferred stock, shares authorized	900,000	900,000
Convertible preferred stock, issued	900,000	900,000
Convertible preferred stock, outstanding	900,000	900,000
Convertible preferred stock, liquidation value	$ 1,800,000
Series B-2 12% convertible preferred stock
Convertible preferred stock, shares authorized	2,100,000	2,100,000
Convertible preferred stock, issued	2,100,000	2,100,000
Convertible preferred stock, outstanding	2,100,000	2,100,000
Convertible preferred stock, liquidation value	$ 4,200,000
Series B-3 8% convertible preferred stock
Convertible preferred stock, shares authorized	2,508,000	2,508,000
Convertible preferred stock, issued	2,508,000	2,508,000
Convertible preferred stock, outstanding	2,508,000	2,508,000
Convertible preferred stock, liquidation value	$ 2,508,000