Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Common stock issuance cost	$ 21,786	$ 21,786
Series B Convertible Preferred Stock
Convertible preferred stock, net of issuance cost			$ 165