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Note 15 - Subsequent Event (Details Textual) - U S Global Investors Funds [Member] | Mar. 31, 2024
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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%

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- Definition Base percentage adjustment when fund performance is not within limits to benchmark index. + References No definition available. + Details
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Namespace Prefix: | grow_
Data Type: | dtr-types:percentItemType
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Period Type: | instant

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- Definition Percent minimum performance to designed benchmark over prior rolling 12 months. + References No definition available. + Details
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Namespace Prefix: | grow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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