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Note 2 - Significant Accounting Policies - Gold Payable (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025
--- | --- | ---
Gold payable | $ 0 | $ 0
SPDR Gold Mini Shares Trust [Member] |  |
Gold payable | $ 0 | $ 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: |