CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
CONSOLIDATED BALANCE SHEETS
Convertible preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Convertible preferred stock, shares authorized	0	50,000
Convertible preferred stock, shares issued	0	50,000
Convertible preferred stock, shares outstanding	0	50,000
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	58,363,740	13,488,366
Common stock, shares outstanding	58,363,740	13,488,366