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

Stock Option Plan - Summary of Share-based Compensation Arrangements by Share-based Payment Award (Detail)

v3.21.2
Stock Option Plan - Summary of Share-based Compensation Arrangements by Share-based Payment Award (Detail) - $ / shares
 4 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Two Thousand And Seventeen Equity Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options available, beginning balance   5,706,056 8,271,517 11,570,290
Options available, authorized       11,924,831
Options available, granted   (8,973,700) (6,446,750) (17,354,941)
Options available, early exercise repurchase     890,960 147,917
Options available, forfeited   1,849,170 2,990,329 1,983,420
Options available, ending balance 8,271,517 9,175,894 5,706,056 8,271,517
Number of shares, beginning balance   34,584,332 32,656,126 18,099,300
Number of shares, granted   8,973,700 6,446,750 17,354,941
Number of shares, exercised   (1,332,592) (1,528,215) (814,695)
Number of shares, forfeited   (1,849,170) (2,990,329) (1,983,420)
Number of shares, ending balance 32,656,126 40,376,270 34,584,332 32,656,126
Weighted average exercise price, beginning balance   $ 1.90 $ 1.74 $ 0.49
Weighted average exercise price, granted   7.95 3.11 3.05
Weighted average exercise price, exercised   1.61 1.95 0.92
Weighted average exercise price, early exercise repurchase     0.86 0.12
Weighted average exercise price, forfeited   4.88 2.65 2.15
Weighted average exercise price, ending balance $ 1.74 $ 3.12 $ 1.90 $ 1.74
Two Thousand And Sixteen Blackmore And Sensor Analytics Equity Incentive Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options available, forfeited 37,924   4,064  
Number of shares, beginning balance 581,730 456,099 538,617  
Number of shares, exercised (5,189)   (78,454)  
Number of shares, forfeited (37,924)   (4,064)  
Number of shares, ending balance 538,617   456,099 538,617
Weighted average exercise price, beginning balance $ 0.84 $ 0.88 $ 0.83  
Weighted average exercise price, exercised 0.15   0.60  
Weighted average exercise price, forfeited 1.09   1.11  
Weighted average exercise price, ending balance $ 0.83   $ 0.88 $ 0.83