CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
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	0
Convertible preferred stock, shares outstanding	5,524,926	0
Liquidation preference value	$ 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	250,000,000
Common stock, shares issued	24,603,104	4,180,484
Common stock, shares outstanding	24,603,104	4,180,484
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	42,617,893
Common stock, shares outstanding	40,301,237	42,617,893