v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Midas Series Trust
Entity Central Index Key 0000770200
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000032073 [Member]  
Shareholder Report [Line Items]  
Fund Name Midas Discovery
Class Name Midas Discovery
Trading Symbol MIDSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Midas Discovery (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.MidasFunds.com. You can also request this information by contacting us at 800-400-6432.
Additional Information Phone Number 800-400-6432
Additional Information Website www.MidasFunds.com
Expenses [Text Block]
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Midas Discovery
$127
2.66%
*Annualized
Expenses Paid, Amount $ 127
Expense Ratio, Percent 2.66% [1]
Net Assets $ 33,679,590
Holdings Count | Holding 19
Advisory Fees Paid, Amount $ 240,784
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics (as of June 30, 2026)
Fund’s net assets
$33,679,590
Total number of portfolio holdings
19
Portfolio turnover rate
25%
Total advisory fees paid
$240,784
Holdings [Text Block]
Graphical Representation of Holdings (as of June 30, 2026)
The tables below show the investment make-up of the Fund, representing percentage of total net assets of the Fund.
Top Ten Security Holdings
Percent of Total Net Assets
DPM Metals Inc.
9%
SSR Mining Inc.
8%
Evolution Mining Limited
8%
IAMGOLD Corp.
7%
Aura Minerals Inc.
7%
Endeavour Mining plc
6%
G Mining Ventures Corp.
6%
Wheaton Precious Metals Corp.
6%
B2Gold Corp.
5%
McEwen Inc.
5%
Total
67%
[image] [image]
Top ten security holdings are shown with approximate percentages of net assets and are subject to change. The above portfolio information should not be considered as a recommendation to purchase or sell a particular security and there is no assurance that any securities will remain a top ten security holding. To the extent the Fund’s holdings are concentrated in a limited number of securities, industries, or sectors, the Fund may be subject to greater volatility and a higher risk of loss. The figures in the table use approximate percentages of net assets and may not add up to 100% due to leverage, cash or other assets, rounding, and other factors.
Largest Holdings [Text Block]
Top Ten Security Holdings
Percent of Total Net Assets
DPM Metals Inc.
9%
SSR Mining Inc.
8%
Evolution Mining Limited
8%
IAMGOLD Corp.
7%
Aura Minerals Inc.
7%
Endeavour Mining plc
6%
G Mining Ventures Corp.
6%
Wheaton Precious Metals Corp.
6%
B2Gold Corp.
5%
McEwen Inc.
5%
Total
67%
Accountant Change Disagreements [Text Block]
Changes in and Disagreements with Accountants
There were no changes in or disagreements with the Fund’s independent registered public accounting firm during the reporting period.
C000119766 [Member]  
Shareholder Report [Line Items]  
Fund Name Midas Special Opportunities
Class Name Midas Special Opportunities
Trading Symbol MISEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Midas Special Opportunities (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.MidasFunds.com. You can also request this information by contacting us at 800-400-6432.
Additional Information Phone Number 800-400-6432
Additional Information Website www.MidasFunds.com
Expenses [Text Block]
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
Midas Special Opportunities
$161
2.98%
*Annualized
Expenses Paid, Amount $ 161
Expense Ratio, Percent 2.98% [2]
Net Assets $ 29,343,393
Holdings Count | Holding 12
Advisory Fees Paid, Amount $ 119,146
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics (as of June 30, 2026)
Fund’s net assets
$29,343,393
Total number of portfolio holdings
12
Portfolio turnover rate
16%
Total advisory fees paid
$119,146
Holdings [Text Block]
Graphical Representation of Holdings (as of June 30, 2026)
The tables below show the investment make-up of the Fund, representing percentage of total net assets of the Fund.
Top Ten Security Holdings
Percent of Total Net Assets
Alphabet Inc. Class A
39%
Lam Research Corporation
18%
Mastercard Inc. Class A
18%
Williams-Sonoma, Inc.
8%
JPMorgan Chase & Co.
8%
Constellation Software Inc.
4%
Berkshire Hathaway Inc. Class B
4%
Microsoft Corp.
3%
The Progressive Corporation
3%
Qualys, Inc.
3%
Total
108%
[image] [image]
Top ten security holdings are shown with approximate percentages of net assets and are subject to change. The above portfolio information should not be considered as a recommendation to purchase or sell a particular security and there is no assurance that any securities will remain a top ten security holding. To the extent the Fund’s holdings are concentrated in a limited number of securities, industries, or sectors, the Fund may be subject to greater volatility and a higher risk of loss. The figures in the table use approximate percentages of net assets and may not add up to 100% due to leverage, cash or other assets, rounding, and other factors.
Largest Holdings [Text Block]
Top Ten Security Holdings
Percent of Total Net Assets
Alphabet Inc. Class A
39%
Lam Research Corporation
18%
Mastercard Inc. Class A
18%
Williams-Sonoma, Inc.
8%
JPMorgan Chase & Co.
8%
Constellation Software Inc.
4%
Berkshire Hathaway Inc. Class B
4%
Microsoft Corp.
3%
The Progressive Corporation
3%
Qualys, Inc.
3%
Total
108%
Accountant Change Disagreements [Text Block]
Changes in and Disagreements with Accountants
There were no changes in or disagreements with the Fund’s independent registered public accounting firm during the reporting period.
[1] Annualized
[2] Annualized