XML 60 R28.htm IDEA: XBRL DOCUMENT
v3.20.4

Common Stock (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Equity [Abstract] |
Summary of Stock Option Activity | A summary of the stock option activity is presented below:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding as of January 1, 2019 |  |  | 971,353 |  |  | $ | 1.01 |  |  |  | 9.8 |  |  | $ | 4,051 |
Granted |  |  | 1,340,839 |  |  |  | 7.97 |  |  |  |  |  |  |  |  |
Exercised |  |  | (5,667 | ) |  |  | 1.01 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (176,893 | ) |  |  | 4.22 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2019 |  |  | 2,129,632 |  |  |  | 5.12 |  |  |  | 9.2 |  |  | $ | 18,844 |
Granted |  |  | 813,172 |  |  |  | 13.03 |  |  |  |  |  |  |  |  |
Exercised |  |  | (25,611 | ) |  |  | 5.44 |  |  |  |  |  |  |  | 183 |
Forfeited |  |  | (16,714 | ) |  |  | 6.30 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 2,900,479 |  |  | $ | 7.33 |  |  |  | 8.5 |  |  | $ | 16,303 |
Options Exercisable at December 31, 2020 |  |  | 1,068,675 |  |  | $ | 4.04 |  |  |  | 8.1 |  |  | $ | 9,059 |
Schedule of Assumptions Used to Estimate Fair Value of Stock Options | The fair value of each award is estimated using Black-Scholes based on the following assumptions:
|  | For the Year Ended December 31,
|  | 2020 |  | 2019
Risk-free interest rate |  | 0.28%—1.48% |  | 1.39%—2.59%
Expected term |  | 5.7—6.1 years |  | 0.3—6.1 years
Expected volatility |  | 70%—79% |  | 70%—76%
Expected dividend yield |  | 0% |  | 0%
Summary of Stock-Based Compensation | The Company has recorded stock-based compensation in the accompanying statements of operations as follows:
|  | For the Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Research and development |  | $ | 1,989 |  |  | $ | 1,304 |
General and administrative |  |  | 2,399 |  |  |  | 996 |
Total |  | $ | 4,388 |  |  | $ | 2,300 |

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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

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