XML 46 R33.htm IDEA: XBRL DOCUMENT
v3.21.2

Stock Option and Grant Plan (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock-based Compensation Expense | Stock-based compensation expense recorded as research and development and general and administrative expenses in the condensed consolidated statements of operations and other comprehensive loss is as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Research and development |  | $ | 6,340 |  |  | $ | 1,805 |  |  | $ | 9,495 |  |  | $ | 3,578 |
General and administrative |  |  | 4,112 |  |  |  | 964 |  |  |  | 5,605 |  |  |  | 1,983 |
Total stock-based compensation expense |  | $ | 10,452 |  |  | $ | 2,769 |  |  | $ | 15,100 |  |  | $ | 5,561 |
Summary of Option Activity Under Equity Award Plans | summary of option activity under the Company’s equity award plans:
|  | Number of options |  |  | Weighted average exercise price |
Outstanding at December 31, 2020 |  |  | 5,336,441 |  |  | $ | 9.70 |
Granted |  |  | 1,236,543 |  |  |  | 86.38 |
Exercised |  |  | (605,509 | ) |  |  | 9.65 |
Forfeitures |  |  | (32,731 | ) |  |  | 28.84 |
Outstanding at June 30, 2021 |  |  | 5,934,744 |  |  |  | 25.58 |
Exercisable as of June 30, 2021 |  |  | 1,733,868 |  |  | $ | 7.48 |
Summary of Restricted Stock Activity | The following table summarizes the Company’s restricted stock activity:
|  | Shares |  |  | Weighted- average grant date fair value |
Unvested as of December 31, 2020 |  |  | 1,275,338 |  |  | $ | 10.95 |
Issued |  |  | 619,030 |  |  |  | 88.49 |
Vested |  |  | (599,207 | ) |  |  | 4.44 |
Cancelled |  |  | (4,500 | ) |  |  | 80.04 |
Unvested as of June 30, 2021 |  |  | 1,290,661 |  |  | $ | 51.04 |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=115993241&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
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration