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v3.22.2.2

Sponsor Earn-Out Liability - Transfers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022
Contingent Liability [Abstract] |  |
Transfers between fair value hierarchy levels | $ 0 | $ 0

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

X
- Definition Fair Value Disclosures, Transfers Between Fair Value Hierarchy Levels + References No definition available. + Details
Name: | ses_FairValueDisclosuresTransfersBetweenFairValueHierarchyLevels
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration