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v3.23.2

Commitments and Contingencies (Details) $ in Millions | Jun. 30, 2023 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Joint development agreements, expenditures related to engineering efforts and purchases of related equipment, maximum | $ 50.0
Joint development agreements, expenditures related to engineering efforts and purchases of related equipment, cumulative amount spent | $ 5.4

X
- Definition Joint Development Agreements, Expenditures Related to Engineering Efforts and Purchases of Related Equipment, Cumulative Amount Spent + References No definition available. + Details
Name: | ses_JointDevelopmentAgreementsExpendituresRelatedToEngineeringEffortsAndPurchasesOfRelatedEquipmentCumulativeAmountSpent
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Joint Development Agreements, Expenditures Related to Engineering Efforts and Purchases of Related Equipment, Maximum + References No definition available. + Details
Name: | ses_JointDevelopmentAgreementsExpendituresRelatedToEngineeringEffortsAndPurchasesOfRelatedEquipmentMaximum
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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