Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Preferred stock par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock shares authorized	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	44,658,054	31,755,169
Common stock, shares outstanding	44,658,054	31,755,169
Series B Convertible Preferred Stock [Member]
Preferred stock par value (in dollars per share)	$ 0.001
Preferred stock shares authorized	13,780	13,780
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred stock, aggregate liquidation preference	$ 0	$ 0