XML 24 R25.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investments - Additional Information (Detail) (USD $) | Sep. 30, 2013 | Jun. 30, 2013
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Fair value of investments held | $ 13,091,000 |
Cost basis of investments held | $ 12,994,822 | $ 13,522,891
Market value of investments to Company's total assets | 34.10% |

X
- Definition Market value of investments to company's assets. + References No definition available. + Details
Name: | grow_MarketValueOfInvestmentsToCompanysAssets
Namespace Prefix: | grow_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Trading and available for sale securities cost. + References No definition available. + Details
Name: | grow_TradingAndAvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | grow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Trading and available for sale securities. + References No definition available. + Details
Name: | grow_TradingAndAvailableForSaleSecuritiesFairValueDisclosure
Namespace Prefix: | grow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration