Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Common stock, par value	$ 0.25	$ 0.25
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	21,158,149	14,658,979
Common stock, shares outstanding	21,158,149	14,658,979
Treasury stock, shares	11,500	11,500
Preferred Series A stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	51	51
Preferred stock, shares issued	51	51
Preferred stock, shares outstanding	51	51
Preferred Series B stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	71,210	71,210
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred Series C stock
Preferred stock, stated value	$ 100	$ 100
Preferred stock, shares authorized	67,361	67,361
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred Series D stock
Preferred stock, cumulative, stated value	$ 100	$ 100
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	141,000	141,000
Preferred stock, shares issued	106,950	141,000
Preferred stock, shares outstanding	106,950	141,000
Preferred Series E stock
Preferred stock, cumulative, stated value	$ 100	$ 100
Preferred stock, cumulative, par value	$ 0.001	$ 0.001
Preferred stock, cumulative, authorized	300,000	300,000
Preferred stock, cumulative, shares issued	223,950	300,000
Preferred stock, cumulative, shares outstanding	223,950	300,000
Preferred Series F stock
Preferred stock, cumulative, stated value	$ 100	$ 100
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,400	3,400
Preferred stock, shares issued	2,500	0
Preferred stock, shares outstanding	2,500	0
Preferred Series G stock
Preferred stock, cumulative, stated value	$ 100	$ 100
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	202,600	0
Preferred stock, shares outstanding	202,600	0