S000003464 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Sit Small Cap Growth Fund | Sit Small Cap Growth Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 9.43% | 13.48% | 16.83% | (25.55%) | 16.24% | 35.93% | 29.17% | (10.71%) | 15.71% | 3.56% |