CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued	5,524,926	5,524,926
Convertible preferred stock, shares outstanding	5,524,926	5,524,926
Redemption value and liquidation preference	$ 12,738,822	$ 9,199,002
Common Stock | Common stock - voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	59,415,042	24,603,104
Common stock, shares outstanding	59,415,042	24,603,104
Common Stock | Common stock - non-voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	40,301,237	40,301,237
Common stock, shares outstanding	40,301,237	40,301,237