S000000885 [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 |
|
| Wasatch Micro Cap Fund | Investor Class shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.84% | 20.91% | 22.58% | (40.64%) | 5.26% | 64.71% | 42.23% | 2.57% | 36.06% | 7.79% |