Shareholder Report, Average Annual Return (Details) |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| C000032073 [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MIDAS DISCOVERY | ||
| Average Annual Return, Percent | 195.76% | 17.47% | 17.26% |
| C000119766 [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | MIDAS SPECIAL OPPORTUNITIES | ||
| Average Annual Return, Percent | 29.87% | 18.25% | 15.32% |
| Standard & Poor's 500 Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500 Index Benchmark (reflects no deduction for fees, expenses, or taxes) | ||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% |