Investment Objectives and Goals |
Mar. 31, 2026 |
|---|---|
| Needham Growth Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | NEEDHAM GROWTH FUND |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The Needham Growth Fund (the “Growth Fund”) seeks long-term, tax-efficient capital appreciation. |
| Needham Aggressive Growth Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | NEEDHAM AGGRESSIVE GROWTH FUND |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The Needham Aggressive Growth Fund (the “Aggressive Growth Fund”) seeks long-term, tax-efficient capital appreciation. |
| Needham Small Cap Growth Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | NEEDHAM SMALL CAP GROWTH FUND |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The Needham Small Cap Growth Fund (the “Small Cap Growth Fund”) seeks long-term, tax-efficient capital appreciation. |