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v3.22.1

Commitments and Contingencies - Additional Information (Details) $ / shares in Units, $ in Millions |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 11, 2021 shares | Dec. 31, 2020 shares | Dec. 31, 2021 USD ($) Day $ / shares
Maximum number of demands for registration of securities | Day |  |  | 3
Numbers of units issued | shares | 3,600,000 | 3,600,000 |
Granted the underwriters |  | 45 days |
Underwriting cash discount per unit | $ / shares |  |  | $ 0.20
Underwriter cash discount | $ |  |  | $ 5.5
Deferred fee per unit | $ / shares |  |  | $ 0.35
Deferred underwriting fee payable | $ |  |  | $ 9.7

X
- Definition Represents the deferred fee per unit. + References No definition available. + Details
Name: | ses_DeferredFeePerUnit
Namespace Prefix: | ses_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The carrying value as of balance sheet date of underwriting fees payable or deferred, classified as noncurrent. + References No definition available. + Details
Name: | ses_DeferredOfferingCostsNoncurrent
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The term of fair value measurement option + References No definition available. + Details
Name: | ses_FairValueMeasurementOptionTerm
Namespace Prefix: | ses_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum number of demands for registration of securities. + References No definition available. + Details
Name: | ses_MaximumNumberOfDemandsForRegistrationOfSecurities
Namespace Prefix: | ses_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the cash underwriting discount per unit. + References No definition available. + Details
Name: | ses_UnderwriterCashDiscount
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the cash underwriting discount per unit. + References No definition available. + Details
Name: | ses_UnderwritingCashDiscountPerUnit
Namespace Prefix: | ses_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new units issued during the period. + References No definition available. + Details
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Namespace Prefix: | ses_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration