Alger Small Cap Focus Fund Annual Fund Operating Expenses - Class Z Shares [Member] - Alger Small Cap Focus Fund - Class Z |
Oct. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.75% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.13% |
| Expenses (as a percentage of Assets) | 0.88% |