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Note 2 - Significant Accounting Policies - Gold Payable (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
Gold payable	$ 39,827	$ 0
SPDR Gold Mini Shares Trust [Member]
Gold payable	$ 39,827	$ 0

X

- Definition

Amount of gold payable.

+ References

No definition available.

+ Details

Name:	gldm_GoldPayable
Namespace Prefix:	gldm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=gldm_SPDRGoldMiniSharesTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: