SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Due from affiliates (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Acquisition related cost reimbursable	$ 189,761	$ 224,723

Amount of acquisition related cost paid by entity on behalf of its joint venture partner reimbursable.

No definition available.

Name:	sdir_AcquisitionRelatedCostPaidOnBehalfOfJointVenturePartnerReimbursableAmount
Namespace Prefix:	sdir_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant