Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity - Mezzanine Equity - 3 months ended Mar. 31, 2021 $ in Thousands	Series X redeemable convertible preferred stock USD ($) shares
Mezzanine equity, beginning balance at Dec. 31, 2020 | $	$ 0
Mezzanine equity, beginning balance (in shares) at Dec. 31, 2020 | shares	0
Series X redeemable convertible preferred stock
Issuance of preferred stock in a private offering of public equity, net of issuance costs | $	$ 84,696
Issuance of preferred stock in a private offering of public equity, net of issuance costs (in shares) | shares	35,573
Issuance of preferred stock upon acquisition of Quellis | $	$ 156,185
Issuance of preferred stock upon acquisition of Quellis (in shares) | shares	50,504
Mezzanine equity, ending balance at Mar. 31, 2021 | $	$ 240,881
Mezzanine equity, ending balance (in shares) at Mar. 31, 2021 | shares	86,077