XML 101 R84.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Stock-Based Compensation - Stock-Based Compensation Expense (Details) - 2018 Equity Inducement Plan and 2016 Employee Stock Purchase Plan - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | $ 14,237 | $ 7,111 | $ 8,038
Non- Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 11,437 | 0 | 0
Research and development | Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 2,910 | 2,591 | 2,723
Research and development | Non- Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 11,328 | 0 | 0
General and administrative | Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | 11,327 | 4,520 | 5,315
General and administrative | Non- Employees |  |  |
Employee Service Share Based Compensation Allocation of Recognized Period Costs [Line Items] |  |  |
Total stock-based compensation expense | $ 109 | $ 0 | $ 0

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=syre_TwoThousandEighteenEquityInducementPlanAndTwoThousandSixteenEmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=syre_EmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=syre_NonEmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |