XML 45 R37.htm IDEA: XBRL DOCUMENT
v3.25.1

Available-for-Sale Securities - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract] |  |
Available-for-sale securities average maturity period | 8 months 12 days | 6 months

X
- Definition Available For Sale Securities Weighted Average Maturity period + References No definition available. + Details
Name: | sldb_AvailableForSaleSecuritiesWeightedAverageMaturityPeriod
Namespace Prefix: | sldb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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