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Note 3 - Offering of the Shares (Details Textual)	Jun. 30, 2025 shares
Shares Prescribed Aggregation (in shares)	50,000

X

- Definition

Prescribed aggregation at which shares are issued and redeemed.

+ References

No definition available.

+ Details

Name:	gsg_SharesPrescribedAggregation
Namespace Prefix:	gsg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant