Note 3 - Investment Management and Other Fees (Details Textual) - USD ($)	3 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Accounts Receivable, Allowance for Credit Loss	$ 0		$ 0
Fund Clients [Member]
Receivables, Net, Current	765,000		683,000
Accounts Receivable, Allowance for Credit Loss	$ 0		0
U S Global E T Fs [Member]
Unitary Management Fee, Percentage of Average Net Assets	0.60%
Aggregate Fees Waived and Expenses Borne	$ 35,000	$ 39,000
Investment Company, Contractual and Voluntary Fees Waived	14,000	10,000
U S Global E T Fs [Member] \| Fund Clients [Member]
Receivables, Net, Current	$ 514,000		494,000
U S Global Jets U C I T S E T F [Member]
Unitary Management Fee, Percentage of Average Net Assets	0.69%
U S Global Investors Funds [Member]
Aggregate Fees Waived and Expenses Borne	$ 226,000	228,000
Investment Company, Contractual and Voluntary Fees Waived	$ 170,000	$ 183,000
Investment Advisory Fees, Fee Adjustment Base Percentage Adjustment When Fund Performance is Not Within Limits to Benchmark Index	0.25%
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months	5.00%
Annual Administrative Fee Rate	0.05%
U S Global Investors Funds [Member] \| Fund Clients [Member]
Receivables, Net, Current	$ 251,000		$ 189,000

Aggregate fees waived and expenses borne.

No definition available.

Name:	grow_AggregateFeesWaivedAndExpensesBorne
Namespace Prefix:	grow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Annual administrative fee rate.

+ References

No definition available.

+ Details

Name:	grow_AnnualAdministrativeFeeRate
Namespace Prefix:	grow_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Base percentage adjustment when fund performance is not within limits to benchmark index.

+ References

No definition available.

+ Details

Name:	grow_InvestmentAdvisoryFeesFeeAdjustmentBasePercentageAdjustmentWhenFundPerformanceIsNotWithinLimitsToBenchmarkIndex
Namespace Prefix:	grow_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percent minimum performance to designed benchmark over prior rolling 12 months.

+ References

No definition available.

+ Details

Name:	grow_InvestmentAdvisoryFeesFeeAdjustmentPercentMinimumPerformanceToDesignedBenchmarkOverPriorRolling12Months
Namespace Prefix:	grow_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The unitary management fee as a percentage of average net assets.

+ References

No definition available.

+ Details

Name:	grow_UnitaryManagementFeePercentageOfAverageNetAssets
Namespace Prefix:	grow_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of fee waived contractually and voluntarily for investment company.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-7

Reference 2: 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)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_InvestmentCompanyContractualAndVoluntaryFeesWaived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

+ Details

Name:	us-gaap_ReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=grow_FundClientsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=grow_USGlobalETFsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=grow_USGlobalJetsUCITSETFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=grow_USGlobalInvestorsFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: