General form of registration statement for all companies including face-amount certificate companies

Stock-based Compensation - Schedule of Stock Option Activity (Detail)

v3.21.2
Stock-based Compensation - Schedule of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
May 31, 2019
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Weighted- Average Exercise Price Per Share        
Options granted $ 0.70      
Options exercised   $ 0.02    
2016 Stock Option and Grant Plan        
Options Available for Grant        
Beginning Balance   144,375 816,316 3,498,354
Additional shares authorized     2,682,255 1,400,000
Options canceled and forfeited     761,430 545,289
Repurchases     21,877 161,307
Options granted     (4,137,503) (4,798,400)
Options expired       9,766
Ending balance     144,375 816,316
Number of Options        
Beginning Balance   7,108,899 3,937,765 1,786,829
Options canceled and forfeited     (761,430) (545,289)
Options granted     4,137,503 4,798,400
Options exercised     (204,939) (2,092,409)
Options expired       (9,766)
Ending balance     7,108,899 3,937,765
Vested and expected to vest     7,108,899  
Shares exercisable (vested and unvested)     1,513,553  
Weighted- Average Exercise Price Per Share        
Beginning Balance   $ 2.29 $ 0.70 $ 0.66
Options canceled and forfeited     0.91 0.69
Options granted     3.53 0.69
Options exercised     1.87 0.66
Options expired       0.70
Ending Balance     2.29 $ 0.70
Vested and expected to vest     2.29  
Shares exercisable (vested and unvested)     $ 1.96  
Weighted- Average Remaining Contractual Term (in years)        
Balances     9 years 21 days 9 years 4 months 13 days
Vested and expected to vest     9 years 21 days  
Shares exercisable (vested and unvested)     8 years 9 months  
Aggregate Intrinsic Value        
Beginning Balance   $ 187,460   $ 28,762
Ending Balance     $ 187,460  
Vested and expected to vest     187,460  
Shares exercisable (vested and unvested)     $ 40,418