XML 74 R52.htm IDEA: XBRL DOCUMENT v3.25.0.1

Related Person Transactions (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
The RMR Group Inc
Related Party Transaction [Line Items]
Property management agreement, termination notice period	30 days
RMR Group
Related Party Transaction [Line Items]
Real estate owned, property management and construction supervision fees		$ 71	$ 17
Management Services | Tremont Realty Advisors LLC
Related Party Transaction [Line Items]
Shares owned by related party (in shares)		1,708,058
Ownership percentage		11.50%
Management Services | Affiliated Entity | Diane Portnoy
Related Party Transaction [Line Items]
Ownership percentage		13.50%
Property Management Services | The RMR Group Inc
Related Party Transaction [Line Items]
Property management fee, percent fee	3.00%
Construction Supervision Services | The RMR Group Inc
Related Party Transaction [Line Items]
Property management fee, percent fee	5.00%

X

- Definition

Property Management Agreement, Termination Notice Period

+ References

No definition available.

+ Details

Name:	sevn_PropertyManagementAgreementTerminationNoticePeriod
Namespace Prefix:	sevn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Real Estate Owned, Property Management And Construction Supervision Fees

+ References

No definition available.

+ Details

Name:	sevn_RealEstateOwnedPropertyManagementAndConstructionSupervisionFees
Namespace Prefix:	sevn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Related Party Transaction, Common Shares Ownership Percentage

+ References

No definition available.

+ Details

Name:	sevn_RelatedPartyTransactionCommonSharesOwnershipPercentage
Namespace Prefix:	sevn_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Related Party Transaction, Shares Owned By Related Party

+ References

No definition available.

+ Details

Name:	sevn_RelatedPartyTransactionSharesOwnedByRelatedParty
Namespace Prefix:	sevn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage charged for managing real estate properties.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyManagementFeePercentFee
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sevn_TheRMRGroupIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sevn_RMRGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sevn_ManagementServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sevn_TremontRealtyAdvisorsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=sevn_DianePortnoyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sevn_PropertyManagementServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sevn_ConstructionSupervisionServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: