Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Apr. 30, 2021 |
Jan. 31, 2021 |
|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 93,255 | $ 18,681 |
| Accumulated Amortization | 4,404 | 3,004 |
| Net Amount | 88,851 | 15,677 |
| Developed technology | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 82,431 | 14,513 |
| Accumulated Amortization | 3,309 | 2,193 |
| Net Amount | $ 79,122 | $ 12,320 |
| Weighted-Average Remaining Useful Life | 90 months | 56 months |
| Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 9,097 | $ 3,769 |
| Accumulated Amortization | 871 | 649 |
| Net Amount | $ 8,226 | $ 3,120 |
| Weighted-Average Remaining Useful Life | 80 months | 54 months |
| Other acquired intangible assets | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 1,727 | $ 399 |
| Accumulated Amortization | 224 | 162 |
| Net Amount | $ 1,503 | $ 237 |
| Weighted-Average Remaining Useful Life | 47 months | 185 months |