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Equity - Unvested RSA & RSU Rollforward (Details) - $ / shares
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
RSUs      
Number of Shares      
Unvested balance, beginning (shares) 9,348,557 0  
Granted (shares) 4,025,850 9,552,687  
Vested (shares) (3,186,218) (36,436)  
Forfeited (shares) (575,866) (167,694)  
Unvested balance, ending (shares) 9,612,323 9,348,557 0
Weighted-Average Grant Date Fair Value per Share      
Unvested balance , beginning balance (in dollars per share) $ 125.06 $ 0  
Granted (in dollars per share) 250.46 123.71  
Vested (in dollars per share) 109.44 50.71  
Forfeited (in dollars per share) 169.74 64.13  
Unvested balance , ending balance (in dollars per share) $ 180.08 $ 125.06 $ 0
Under the Plans | RSA      
Number of Shares      
Unvested balance, beginning (shares) 0 16,700 920,380
Granted (shares)     16,700
Vested (shares) 0 (16,700) (920,380)
Repurchased (in shares)     0
Unvested balance, ending (shares) 0 0 16,700
Weighted-Average Grant Date Fair Value per Share      
Unvested balance , beginning balance (in dollars per share) $ 0 $ 8.58 $ 7.24
Granted (in dollars per share)     8.58
Vested (in dollars per share) 0 8.58 7.24
Repurchased (in dollars per share)     0
Unvested balance , ending balance (in dollars per share) $ 0 $ 0 $ 8.58
Out of the Plans | RSA      
Number of Shares      
Unvested balance, beginning (shares) 741,911 1,603,562 1,652,446
Granted (shares)     661,635
Vested (shares) (361,651) (861,651) (442,222)
Repurchased (in shares)     (268,297)
Unvested balance, ending (shares) 380,260 741,911 1,603,562
Weighted-Average Grant Date Fair Value per Share      
Unvested balance , beginning balance (in dollars per share) $ 2.11 $ 2.06 $ 1.49
Granted (in dollars per share)     1.61
Vested (in dollars per share) 2.10 2.03 0.50
Repurchased (in dollars per share)     0
Unvested balance , ending balance (in dollars per share) $ 2.11 $ 2.11 $ 2.06