XML 57 R33.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Summary of stock option activity | The following table summarizes the Company’s stock option activity under the 2017 Plan during the year ended December 31, 2023:
|  | Number of Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (In Years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2022 |  |  | 22,997,639 |  |  | $ | 0.34 |  |  |  | 7.94 |  |  | $ | 362 |
Granted |  |  | 3,221,672 |  |  |  | 0.52 |  |  |  | — |  |  |  |  |
Exercised |  |  | (333,619 | ) |  |  | 0.32 |  |  |  | — |  |  |  |  |
Cancelled |  |  | (2,720,299 | ) |  |  | 0.35 |  |  |  | — |  |  |  |  |
Outstanding at December 31, 2023 |  |  | 23,165,393 |  |  | $ | 0.36 |  |  |  | 6.87 |  |  | $ | 10,712 |
Exercisable at December 31, 2023 |  |  | 12,899,524 |  |  | $ | 0.33 |  |  |  | 5.36 |  |  | $ | 6,299 |
Schedule of stock options granted | The underlying assumptions used to value stock options granted using the Black-Scholes option-pricing model during the years ended December 31, 2023 and 2022 were as follows:
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Risk-free interest rate range |  |  | 3.59% – 4.67% |  |  |  | 1.74% – 3.90% |
Expected dividend rate |  |  | — |  |  |  | — |
Expected term (years) range |  |  | 5.08 – 6.12 |  |  |  | 5.94 – 6.11 |
Expected stock price volatility range |  |  | 88.9% – 94.0% |  |  |  | 85.9% – 88.9% |
Summary of stock based compensation expense | The Company recorded stock-based compensation expense in the following expense categories of its statements of operations (in thousands):
|  | Year Ended December 31, |
|  | 2023 |  |  | 2022 |
Research and development |  | $ | 500 |  |  | $ | 447 |
General and administrative |  |  | 929 |  |  |  | 791 |
Total stock-based compensation expense |  | $ | 1,429 |  |  | $ | 1,238 |

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 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration