Expense Example - SIT U S GOVERNMENT SECURITIES FUND INC |
Mar. 31, 2025
USD ($)
|
|---|---|
| Sit U.S. Government Securities Fund - Class S | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 82 |
| Expense Example, with Redemption, 3 Years | 256 |
| Expense Example, with Redemption, 5 Years | 446 |
| Expense Example, with Redemption, 10 Years | 993 |
| Sit U.S. Government Securities Fund - Class Y | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 5,638 |
| Expense Example, with Redemption, 3 Years | 17,674 |
| Expense Example, with Redemption, 5 Years | 30,802 |
| Expense Example, with Redemption, 10 Years | $ 69,070 |