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Sponsor Earn-Out Liability - General Information (Details)	Feb. 02, 2022 $ / shares shares
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Sponsor Earn-Out Shares, shares issued (in shares) | shares	6,900,000
Sponsor Earn-Out Shares, par value (in dollars per shares) | $ / shares	$ 0.0001

X

- Definition

Earn-out Shares, Sponsor Earn-out Shares, Par or Stated Value Per Share

+ References

No definition available.

+ Details

Name:	ses_EarnOutSharesSponsorEarnOutSharesParOrStatedValuePerShare
Namespace Prefix:	ses_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Earn-out Shares, Sponsor Earn-out Shares, Shares Issued

+ References

No definition available.

+ Details

Name:	ses_EarnOutSharesSponsorEarnOutSharesSharesIssued
Namespace Prefix:	ses_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration