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v3.21.2

SUBSEQUENT EVENT (Details) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2022 | Dec. 31, 2021
Class A and C [Member] | Forecast [Member] |  |
SUBSEQUENT EVENT (Details) [Line Items] |  |
Monthly Dividend Declared | $ 0.0075 | $ 0.0075

X
- Definition Monthly declared dividend per share. + References No definition available. + Details
Name: | grow_MonthlyDividendDeclared
Namespace Prefix: | grow_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | grow_SUBSEQUENTEVENTDetailsLineItems
Namespace Prefix: | grow_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=grow_ClassAAndCMember
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: |