Basis of Presentation and Significant Accounting Policies - Sponsor Earn-Out Liability - General Information (Details)	Feb. 02, 2022 $ / shares shares
Accounting Policies [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

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

No definition available.

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