XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Leases - General Information (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Oct. 31, 2022 USD ($) ft²
Boston Facility, Additional Space [Member] | Subsequent Event [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Area of real estate property | ft² |  | 5,000
Lessee, operating lease, term of contract |  | 8 years
Lessee, operating lease, base rent, term | $ |  | $ 1.5
Certain Operating Leases, Escalating Rental Payments, Leases with Option to Extend [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Lessee, operating lease, existence of option to extend | true |
Lessee, operating lease, renewal term | 5 years |
Certain Operating Leases, Escalating Rental Payments, Leases with Options to Terminate Lease at Certain Times within Lease Term [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Lessee, operating lease, existence of option to terminate | true |

X
- Definition Lessee, Operating Lease, Base Rent, Term + References No definition available. + Details
Name: | ses_LesseeOperatingLeaseBaseRentTerm
Namespace Prefix: | ses_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend
Namespace Prefix: | us-gaap_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indicates (true false) whether lessee has option to terminate operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseExistenceOfOptionToTerminate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=ses_BostonFacilityAdditionalSpaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=ses_CertainOperatingLeasesEscalatingRentalPaymentsLeasesWithOptionToExtendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=ses_CertainOperatingLeasesEscalatingRentalPaymentsLeasesWithOptionsToTerminateLeaseAtCertainTimesWithinLeaseTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |