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Note 3 - Trust Expenses (Details Textual) - USD ($)	3 Months Ended		72 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Jun. 30, 2027
Management and Service Fees, Base Rate	0.09%
Sponsor Fees Waived	$ 365,770	$ 80,785
Maximum [Member]
Legal Fees Per Year	$ 500,000
Maximum [Member] | Forecast [Member]
Sponsors Fee After Fee Waiver, Percentage			0.07%

X

- Definition

Maximum per annum in legal fees and expenses the sponsor has agreed to assume.

+ References

No definition available.

+ Details

Name:	iaum_LegalFeesPerYear
Namespace Prefix:	iaum_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of sponsor fees waived during period.

+ References

No definition available.

+ Details

Name:	iaum_SponsorFeesWaived
Namespace Prefix:	iaum_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The percentage of sponsor's fee after fee waiver.

+ References

No definition available.

+ Details

Name:	iaum_SponsorsFeeAfterFeeWaiverPercentage
Namespace Prefix:	iaum_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Base rate for management and service fees under arrangement to manage operations, including, but not limited to, investment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_ManagementAndServiceFeesBaseRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: