XML 26 R18.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Stockholders' Equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Summary of Common Stock Reserved for Future Issuance | Common Stock Reserved for Future Issuance Common stock reserved for future issuance was as follows:
|  | March 31, 2024 |
Common stock warrants |  |  | 5,864 |
Common stock options and restricted stock units |  |  | 5,712,725 |
Shares available under the 2015 equity incentive plan |  |  | 2,238,757 |
Shares available under the 2022 inducement plan |  |  | 106,483 |
Shares available under the employee stock purchase plan |  |  | 727,311 |
|  |  | 8,791,140 |
Summary of Stock Option Activity | The following table summarizes our stock option activity under all equity incentive plans for the three months ended March 31, 2024:
|  | Number of Outstanding Stock Options |  |  | Weighted- Average Exercise Price |
Outstanding as of December 31, 2023 |  |  | 3,956,827 |  |  | $ | 6.00 |
Granted |  |  | 1,750,098 |  |  | $ | 1.50 |
Canceled/forfeited/expired |  |  | (35,416 | ) |  | $ | 4.64 |
Outstanding as of March 31, 2024 |  |  | 5,671,509 |  |  | $ | 4.62 |
Schedule of Restricted Stock Units Activity | The following table summarizes our restricted stock unit activity under all equity incentive plans for the three months ended March 31, 2024:
|  | Number of Outstanding Restricted Stock Units |  |  | Weighted-Average Grant Date Fair Value |
Balance as of December 31, 2023 |  |  | 63,327 |  |  | $ | 5.45 |
Released |  |  | (22,111 | ) |  | $ | 5.39 |
Balance as of March 31, 2024 |  |  | 41,216 |  |  | $ | 5.48 |
Schedule of Allocation of Stock-Based Compensation for All Options and Restricted Stock Units and Stock Issued Pursuant to Our Employee Stock Purchase Plan | The allocation of stock-based compensation for all options and restricted stock units and stock issued pursuant to our employee stock purchase plan is as follows (in thousands):
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
Research and development |  | $ | 169 |  |  | $ | 129 |
General and administrative |  |  | 571 |  |  |  | 490 |
Total stock-based compensation expense |  | $ | 740 |  |  | $ | 619 |
Employee Stock Option [Member] |
Summary of Assumptions Used to Determine Fair Value of Employee Stock Option Grants and Performance Options with Market Condition | The assumptions used in the Black-Scholes option pricing model to determine the fair value of the employee stock option grants were as follows:
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
Expected term (in years) |  | 5.94 – 6.02 |  |  | $ | 6.02 |
Risk-free interest rate |  | 3.8% – 4.0% |  |  |  | 4.0 | %
Expected volatility |  | 80.3% – 80.5% |  |  |  | 82.0 | %
Expected dividend yield |  |  | 0.0 | % |  |  | 0.0 | %

X
- Definition Schedule of common stock reserved for future issuance. + References No definition available. + Details
Name: | life_ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock
Namespace Prefix: | life_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 -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 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
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

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |