Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Common stock, par value	$ 0.001	$ 0.11
Common stock, shares issued	1,181,733	1,155,366
Common stock, outstanding	1,181,733	1,155,366
Series A convertible preferred stock
Convertible preferred stock, par value	$ 0.001	$ 0.001
Convertible preferred stock, issued	612,446	612,446
Convertible preferred stock, outstanding	612,446	612,446
Convertible preferred stock, liquidation preference	$ 6,483,044
Series B convertible preferred stock
Convertible preferred stock, par value	$ 0.001	$ 0.001
Convertible preferred stock, issued	7,235,969	7,235,969
Convertible preferred stock, outstanding	7,235,969	7,235,969
Convertible preferred stock, liquidation preference	$ 62,288,856
Series C convertible preferred stock
Convertible preferred stock, par value	$ 0.001	$ 0.001
Convertible preferred stock, issued	5,179,877	4,712,698
Convertible preferred stock, outstanding	5,179,877	4,712,698
Convertible preferred stock, liquidation preference	$ 66,451,815

Face amount or stated value per share of common stock.

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