Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jul. 31, 2021 |
Jan. 31, 2021 |
|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 93,274 | $ 18,681 |
| Accumulated Amortization | 7,694 | 3,004 |
| Net Amount | 85,580 | 15,677 |
| Developed technology | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 82,416 | 14,513 |
| Accumulated Amortization | 6,062 | 2,193 |
| Net Amount | $ 76,354 | $ 12,320 |
| Weighted-Average Remaining Useful Life | 87 months | 56 months |
| Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 9,084 | $ 3,769 |
| Accumulated Amortization | 1,215 | 649 |
| Net Amount | $ 7,869 | $ 3,120 |
| Weighted-Average Remaining Useful Life | 77 months | 54 months |
| Other acquired intangible assets | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 1,774 | $ 399 |
| Accumulated Amortization | 417 | 162 |
| Net Amount | $ 1,357 | $ 237 |
| Weighted-Average Remaining Useful Life | 55 months | 185 months |