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Commitments and Contingencies - Summary of Future Minimum Annual Payments to Purchase Commitments (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2026 USD ($)
Commitments and Contingencies Disclosure [Abstract] |
2026 - Remainder | $ 3,921
2027 | 5,978
2028 | 6,900
2029 | 7,950
2030 | 9,050
Total purchase commitment | $ 33,799

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- Definition Long-Term Purchase Commitment, Amount, to be Paid, Year Four + References No definition available. + Details
Name: | smrt_Long-TermPurchaseCommitmentAmountToBePaidYearFour
Namespace Prefix: | smrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Long-Term Purchase Commitment, Amount, to be Paid, Year One + References No definition available. + Details
Name: | smrt_Long-TermPurchaseCommitmentAmountToBePaidYearOne
Namespace Prefix: | smrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Long-Term Purchase Commitment, Amount, to be Paid, Year Three + References No definition available. + Details
Name: | smrt_Long-TermPurchaseCommitmentAmountToBePaidYearThree
Namespace Prefix: | smrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Long-Term Purchase Commitment, Amount, to be Paid, Year Two + References No definition available. + Details
Name: | smrt_Long-TermPurchaseCommitmentAmountToBePaidYearTwo
Namespace Prefix: | smrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Long-term purchase commitment remainder of fiscalyear. + References No definition available. + Details
Name: | smrt_Long-TermPurchaseCommitmentRemainderOfFiscalYear
Namespace Prefix: | smrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration