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Note 18 - Subsequent Events (Details Textual) - USD ($) | 2 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 04, 2025 | Jun. 30, 2025 | Jun. 30, 2024
Equity Securities Without Readily Determinable Fair Values, Unrealized Gain (Loss) |  | $ (362,000) | $ (1,000,000)
Subsequent Event [Member] |  |  |
Equity Securities Without Readily Determinable Fair Values, Unrealized Gain (Loss) | $ 1,300,000 |  |

X
- Definition Amount of unrealized gain (loss) on investment in equity security without readily determinable fair value with change in fair value recognized in net income. + References No definition available. + Details
Name: | grow_EquitySecuritiesWithoutReadilyDeterminableFairValuesUnrealizedGainLoss
Namespace Prefix: | grow_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |