Post-effective amendment to a registration statement that is not immediately effective upon filing

Convertible Preferred Shares - Summary of Convertible Preferred Shares (Detail)

v3.21.2
Convertible Preferred Shares - Summary of Convertible Preferred Shares (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Temporary Equity [Line Items]      
Carrying Value $ 0 $ 272,815 $ 249,081
Series A Convertible Preferred Shares [Member]      
Temporary Equity [Line Items]      
Number of shares Authorized   20,418,209 20,418,209
Number of shares Issued and outstanding   20,418,209 20,418,209
Carrying Value   $ 9,000  
Liquidation preference   $ 11,682  
Series B Convertible Preferred Shares [Member]      
Temporary Equity [Line Items]      
Number of shares Authorized 0 15,906,053 15,906,053
Number of shares Issued and outstanding   15,906,053 15,906,053
Carrying Value $ 0 $ 66,348 $ 66,348
Liquidation preference   $ 89,659  
Series B-1 Convertible Preferred Shares [Member]      
Temporary Equity [Line Items]      
Number of shares Authorized 0 3,032,940 3,032,940
Number of shares Issued and outstanding   3,032,940 3,032,940
Carrying Value $ 0 $ 12,500 $ 12,500
Liquidation preference   $ 13,693  
Series C Convertible Preferred Shares [Member]      
Temporary Equity [Line Items]      
Number of shares Authorized 0 28,973,439 28,973,439
Number of shares Issued and outstanding   28,216,005 28,216,005
Carrying Value $ 0 $ 161,233 $ 161,233
Liquidation preference   $ 186,954  
Series C-1 Convertible Preferred Shares [Member]      
Temporary Equity [Line Items]      
Number of shares Authorized 0 15,191,550 0
Number of shares Issued and outstanding   2,699,114 0
Carrying Value $ 0 $ 23,734  
Liquidation preference   $ 26,218