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Stock-based compensation (Tables) | 12 Months Ended
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Mar. 31, 2021
Stock-based Compensation |
Summary of stock option activity |
|  |  |  | Weighted |  | Weighted Average |  |
|  | Number of |  | Average |  | Contractual Term |  | Aggregate
|  | Shares |  | Exercise Price |  | (Years) |  | Intrinsic Value
Outstanding as of March 31, 2020 |  | 4,964,381 |  | $ | 9.78 |  | 8.03 |  | $ | 15,345
Granted |  | 2,622,519 |  |  | 18.10 |  | 9.22 |  |  |
Exercised |  | (794,477) |  |  | 7.23 |  | 6.41 |  | $ | 24,859
Cancelled |  | (332,239) |  |  | 14.00 |  |  |  |  |
Outstanding as of March 31, 2021 |  | 6,460,184 |  |  | 13.26 |  | 7.95 |  | $ | 116,193
Options exercisable as of March 31, 2020 |  | 2,117,721 |  | $ | 5.67 |  | 7.20 |  | $ | 11,733
Options exercisable as of March 31, 2021 |  | 2,698,708 |  | $ | 8.38 |  | 6.79 |  | $ | 59,717
Schedule of stock-based compensation expense | The following table summarizes the classification of stock-based compensation expense in the consolidated statements of operations for the years ended March 31, 2021 and 2020 as follows:
|  | Twelve Months Ended
|  | March 31,
|  | 2021 |  | 2020
Research and development |  | $ | 5,749 |  | $ | 3,689
General and administrative |  |  | 6,041 |  |  | 4,052
|  | $ | 11,790 |  | $ | 7,741
The following table summarizes stock-based compensation expense by award type for the years ended March 31, 2021 and 2020 as follows:
|  | Twelve Months Ended
|  | March 31,
|  | 2021 |  | 2020
Stock options |  | $ | 11,778 |  | $ | 7,741
Restricted stock units |  |  | 12 |  |  | —
|  | $ | 11,790 |  | $ | 7,741
Summary of changes in company's RSU |
|  |  |  | Weighted
|  | Number of |  | Average
|  | Restricted |  | Grant Date
|  | Shares |  | Fair Value
Outstanding as of March 31, 2020 |  | — |  | $ | —
Granted |  | 15,975 |  |  | 34.15
Vested |  | — |  |  | —
Cancelled |  | — |  |  | —
Outstanding as of March 31, 2021 |  | 15,975 |  |  | 34.15
Stock options |
Stock-based Compensation |
Schedule of assumptions used to determine the grant-date fair value of stock options granted |
|  | Twelve Months Ended |
|  | March 31, |
|  | 2021 |  | 2020 |
Risk-free interest rate |  | 0.93 | % | 2.12 | %
Expected term (in years) |  | 6.3 |  | 6.0 |
Expected volatility |  | 75.4 | % | 71.4 | %
Expected dividend yield |  | 0 | % | 0 | %

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -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 (c)(2) -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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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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