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Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' (Deficit) Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2020
IPO |  |  |
Stock issuance costs |  |  | $ 18.7
Private Placement |  |  |
Stock issuance costs |  | $ 8.0 |
ATM Offering |  |  |
Stock issuance costs | $ 5.5 |  |

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