| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | US Global Investors Funds |
| Entity Central Index Key | 0000101507 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000069385 | |
| Shareholder Report [Line Items] | |
| Fund Name | USGI Global Luxury Goods Fund |
| Class Name | Investor |
| Trading Symbol | USLUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI Global Luxury Goods Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI Global Luxury Goods Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $77 1.51% |
| Expenses Paid, Amount | $ 77 |
| Expense Ratio, Percent | 1.51% |
| AssetsNet | $ 48,462,732 |
| Holdings Count | Holding | 56 |
| Advisory Fees Paid, Amount | $ 152,936 |
| InvestmentCompanyPortfolioTurnover | 79% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $48,462,732 # of Portfolio Holdings 56 Portfolio Turnover Rate 79% Management Fee (Net of fees waived) $152,936 |
| Holdings [Text Block] | Sector Weightings (% total investments) Value Value Consumer Discretionary 50.3% Financials 21.0% Consumer Staples 12.7% Materials 10.9% Communication Services 5.0% Other 0.1% |
| Largest Holdings [Text Block] | Top Ten Holdings (% of investments) Cie Financiere Richemont SA 6.57% Hermes International SCA 5.68% Amazon.com, Inc. 4.78% KKR & Co., Inc. 4.44% Industria de Diseno Textil SA 4.25% UBS Group AG 4.14% LVMH Moet Hennessy Louis Vuitton SE, ADR 4.05% Constellation Brands, Inc., Class A 3.68% Apollo Global Management, Inc. 3.65% Lululemon Athletica, Inc. 3.42% |
| C000012993 | |
| Shareholder Report [Line Items] | |
| Fund Name | Global Resources Fund |
| Class Name | Investor |
| Trading Symbol | PSPFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI Global Resources Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI Global Resources Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B39"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $73 1.48% |
| Expenses Paid, Amount | $ 73 |
| Expense Ratio, Percent | 1.48% |
| AssetsNet | $ 41,729,829 |
| Holdings Count | Holding | 139 |
| Advisory Fees Paid, Amount | $ 88,288 |
| InvestmentCompanyPortfolioTurnover | 45% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $41,729,829 # of Portfolio Holdings 139 Portfolio Turnover Rate 45% Management Fee (Net of fees waived) $88,288 |
| Holdings [Text Block] | Sector Weightings (% total investments) Value Value Metal - Diversified 17.1% Gold Mining 16.7% Oil Companies - Exploration & Production 11.7% Enterprise Software/Services 8.9% Non-Ferrous Metals 5.8% Oil - US Royalty Trusts 5.1% Oil Companies - Field Services 3.5% Pipelines 3.5% Diversified Minerals 3.2% Other 24.5% |
| Largest Holdings [Text Block] | Top Ten Holdings (% of investments) Abaxx Technologies, Inc. 7.19% Ivanhoe Mines, Ltd. 6.18% Filo Corp. 5.27% Cheniere Energy, Inc. 3.14% Kimbell Royalty Partners LP 2.16% Linde PLC 2.10% OceanaGold Corp. 1.93% Viper Energy, Inc. 1.80% NG Energy International Corp. 1.79% K92 Mining, Inc. 1.73% |
| C000012994 | |
| Shareholder Report [Line Items] | |
| Fund Name | Gold and Precious Metals Fund |
| Class Name | Investor |
| Trading Symbol | USERX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI Gold and Precious Metals Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI Gold and Precious Metals Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B59"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $92 1.73% |
| Expenses Paid, Amount | $ 92 |
| Expense Ratio, Percent | 1.73% |
| AssetsNet | $ 101,512,583 |
| Holdings Count | Holding | 71 |
| Advisory Fees Paid, Amount | $ 434,999 |
| InvestmentCompanyPortfolioTurnover | 29% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $101,512,583 # of Portfolio Holdings 71 Portfolio Turnover Rate 29% Management Fee Paid $434,999 |
| Holdings [Text Block] | Sector Weightings (% total investments) Value Value Gold Mining 64.6% Silver Mining 11.0% Precious Metals 7.9% Metal - Diversified 7.1% Mining Services 3.0% Other 6.4% |
| Largest Holdings [Text Block] | Top Ten Holdings (% of investments) K92 Mining, Inc. 9.62% Aya Gold & Silver, Inc. 6.84% Vox Royalty Corp. 4.09% Alamos Gold, Inc. 3.86% OceanaGold Corp. 3.39% Equinox Gold Corp. 2.83% Mineros SA 2.67% Karora Resources, Inc. 2.57% Emerald Resources NL 2.31% Ivanhoe Mines, Ltd. 2.23% |
| C000013000 | |
| Shareholder Report [Line Items] | |
| Fund Name | Near-Term Tax Free Fund |
| Class Name | Investor |
| Trading Symbol | NEARX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI Near-Term Tax Free Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI Near-Term Tax Free Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B79"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $22 0.45% |
| Expenses Paid, Amount | $ 22 |
| Expense Ratio, Percent | 0.45% |
| AssetsNet | $ 25,030,270 |
| Holdings Count | Holding | 67 |
| Advisory Fees Paid, Amount | $ (51,026) |
| InvestmentCompanyPortfolioTurnover | 17% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $25,030,270 # of Portfolio Holdings 67 Portfolio Turnover Rate 17% Management Fee (Net of fees waived) $(51,026) |
| Holdings [Text Block] | Maturity Weightings (% total investments) Value Value Value Value Value Value Less than 1 Month 1,535,651 6.9% 1-3 Months 3,053,408 13.6% 3-12 Months 6,001,611 27.2% 1-3 Years 9,434,056 42.2% 3-5 Years 2,238,524 10.1% |
| Largest Holdings [Text Block] | Top Ten Area Concentrations (% of net assets) Pennsylvania 8.83% Texas 8.38% Minnesota 6.59% New Mexico 4.64% Michigan 4.46% Colorado 3.48% California 3.41% Massachusetts 3.24% Missouri 2.89% Florida 2.84% |
| C000012998 | |
| Shareholder Report [Line Items] | |
| Fund Name | U.S. Government Securities Ultra-Short Bond Fund |
| Class Name | Investor |
| Trading Symbol | UGSDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI U.S. Government Securities Ultra-Short Bond Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI U.S. Government Securities Ultra-Short Bond Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B99"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $23 0.45% |
| Expenses Paid, Amount | $ 23 |
| Expense Ratio, Percent | 0.45% |
| AssetsNet | $ 30,072,414 |
| Holdings Count | Holding | 12 |
| Advisory Fees Paid, Amount | $ (39,483) |
| InvestmentCompanyPortfolioTurnover | 33% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $30,072,414 # of Portfolio Holdings 12 Portfolio Turnover Rate 33% Management Fee (Net of fees waived) $(39,483) |
| Holdings [Text Block] | Sector Weightings (% total investments) Value Value Federal Home Loan Mortgage Corp. 26.1% Federal Home Loan Bank 23.6% U.S. Treasury Bill 21.9% Federal Farm Credit Bank 21.8% U.S. Treasury Note/Bond 6.6% |
| Largest Holdings [Text Block] | Top Ten Holdings (% of investments) U.S. Treasury Bill 13.22% Federal Home Loan Mortgage Corp. 13.11% Federal Home Loan Mortgage Corp., MTN 12.97% Federal Home Loan Bank 8.84% Federal Farm Credit Bank 8.82% U.S. Treasury Bill 8.76% Federal Farm Credit Bank 8.66% U.S. Treasury Note/Bond 6.57% Federal Home Loan Bank 6.09% |
| C000012995 | |
| Shareholder Report [Line Items] | |
| Fund Name | USGI World Precious Minerals Fund |
| Class Name | Investor |
| Trading Symbol | UNWPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the USGI World Precious Minerals Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | This semi-annual shareholder report contains important information about the USGI World Precious Minerals Fund for the period of January 1, 2024, to June 30, 2024. You can find additional information about the Fund at www.usfunds.com/invest-with-us/prospectus-2 |
| Additional Information Phone Number | (800) 873-8637 |
| Additional Information Website | www.usfunds.com/invest-with-us/prospectus-2</span>/" id="sjs-B119"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: justify;">www.usfunds.com/invest-with-us/prospectus-2</span>/ |
| Expenses [Text Block] | What were the Fund's costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Investor Class $76 1.48% |
| Expenses Paid, Amount | $ 76 |
| Expense Ratio, Percent | 1.48% |
| AssetsNet | $ 41,616,658 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 68,905 |
| InvestmentCompanyPortfolioTurnover | 14% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $41,616,658 # of Portfolio Holdings 167 Portfolio Turnover Rate 14% Management Fee (Net of fees waived) $68,905 |
| Holdings [Text Block] | Sector Weightings (% total investments) Value Value Gold Mining 52.0% Precious Metals 18.2% Silver Mining 7.9% Advanced Materials/Production 6.9% Metal - Diversified 6.0% Diversified Minerals 3.8% Other 5.2% |
| Largest Holdings [Text Block] | Top Ten Holdings (% of investments) TriStar Gold, Inc. 11.13% K92 Mining, Inc. 6.92% Nano One Materials Corp. 6.64% Dolly Varden Silver Corp. 3.75% Arizona Metals Corp. 3.48% Vizsla Silver Corp. 3.40% Ivanhoe Mines, Ltd. 3.10% Radisson Mining Resources, Inc. 2.68% First Nordic Metals Corp. 2.60% Asante Gold Corp. 2.55% |
