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Stock-Based Compensation (Tables) | 6 Months Ended
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Jul. 31, 2021
Share-based Payment Arrangement [Abstract] |
Share-based Payment Arrangement, Option, Activity | A summary of our stock option plan activity under the 2013 Plan is as follows:
| Number of Options |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding as of January 31, 2021 | 37,231,191 |  |  | $ | 1.68 |  |  | 8.34 |  | $ | 442,515 |
Granted | 14,048,623 |  |  | $ | 9.66 |  |  |  |  |
Exercised | (3,296,747) |  |  | $ | 1.24 |  |  |  |  |
Forfeited | (352,965) |  |  | $ | 3.86 |  |  |  |  |
Outstanding as of July 31, 2021 | 47,630,102 |  |  | $ | 4.04 |  |  | 8.44 |  | $ | 2,156,010 |
Expected to vest as of July 31, 2021 | 47,630,206 |  |  | $ | 4.04 |  |  | 8.44 |  | $ | 2,156,010 |
Vested and exercisable as of July 31, 2021 | 15,494,656 |  |  | $ | 1.51 |  |  | 7.28 |  | $ | 740,631 |
Nonvested Restricted Stock Shares Activity | A summary of our RSUs is as follows:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Outstanding as of January 31, 2021 | — |  |  | $ | — |
Granted | 346,483 |  |  | $ | 32.39 |
Forfeited | — |  |  | — |
Outstanding as of July 31, 2021 | 346,483 |  |  | $ | 32.39 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions |
| Three Months Ended July 31, |  | Six Months Ended July 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Expected term (in years) | 6.0 |  | 6.0 |  | 6.0 |  | 6.0
Expected volatility | 62.3 | % |  | 48.3 | % |  | 62.3% - 66.0% |  | 48.3%- 48.5%
Risk-free interest rate | 1.1 | % |  | 0.4 | % |  | 0.8% - 1.1% |  | 0.4% - 0.5%
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Schedule of Components of Stock-based Compensation Expense | The components of stock-based compensation expense recognized in the consolidated statements of operations consisted of the following (in thousands):
| Three Months Ended July 31, |  | Six Months Ended July 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Cost of revenue | $ | 840 |  |  | $ | 65 |  |  | $ | 1,223 |  |  | $ | 135 |
Research and development | 8,823 |  |  | 261 |  |  | 15,962 |  |  | 3,024 |
Sales and marketing | 3,905 |  |  | 606 |  |  | 5,952 |  |  | 1,067 |
General and administrative | 7,825 |  |  | 656 |  |  | 11,693 |  |  | 1,013 |
Total | $ | 21,393 |  |  | $ | 1,588 |  |  | $ | 34,830 |  |  | $ | 5,239 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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