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BUSINESS COMBINATION - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 0 Months Ended
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014 | Jun. 01, 2014 | Mar. 31, 2013
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Gain (loss) in earnings of Galileo | $ 0 us-gaap_IncomeLossFromEquityMethodInvestments | $ 30 us-gaap_IncomeLossFromEquityMethodInvestments | $ 0 us-gaap_IncomeLossFromEquityMethodInvestments | $ 15 us-gaap_IncomeLossFromEquityMethodInvestments |  |
Galileo Global Equity Advisor Inc |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of shares issued and outstanding of Galileo |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember
Purchase of Galileo shares |  |  |  |  |  | 600 us-gaap_PaymentsToAcquireEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember
Purchase of additional equity shares |  |  |  |  | 15.00%grow_SubsidiaryorEquityMethodInvesteeAdditionalPercentageOwnershipAcquired / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember |
Payments to acquire additional interest in subsidiary |  |  |  |  | 180 us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember |
Percentage of shares issued and outstanding of Galileo |  |  |  |  | 65.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember |
Other income | Galileo Global Equity Advisor Inc |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Gain (loss) in earnings of Galileo |  | $ 30 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherIncomeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember |  | $ 15 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherIncomeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = grow_GalileoGlobalEquityAdvisorIncMember |  |

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