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Summary of Significant Accounting Policies - Summary of Sponsorship Funding Payments (Detail) | 12 Months Ended
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Dec. 31, 2023 USD ($)
Accounting Policies [Abstract] |
Balance as of December 31, 2022 | $ 0
Amounts incurred | 3,526,927
Recorded sponsor funding reduction | (33,643)
Balance as of December 31, 2023 | $ 3,493,284

X
- Definition Amounts incurred in sponsorship funding. + References No definition available. + Details
Name: | ck0001585389_AmountsIncurredInSponsorshipFunding
Namespace Prefix: | ck0001585389_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Recorded sponsor funding reductions. + References No definition available. + Details
Name: | ck0001585389_RecordedSponsorFundingReductions
Namespace Prefix: | ck0001585389_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sponsorship funding payments balance. + References No definition available. + Details
Name: | ck0001585389_SponsorshipFundingPaymentsBalance
Namespace Prefix: | ck0001585389_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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