Summary of Significant Accounting Policies, Offering Costs (Details) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Offering Costs [Abstract]
Offering costs	$ 203,050	$ 200,000	$ 209,416
Offering costs payable	$ 40,000	$ 37,000

The expenses payable consist primarily of legal fees and other costs incurred with share offerings, the preparation of registration statement and registration fees.

No definition available.

Name:	star_OfferingCostsPayable
Namespace Prefix:	star_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant