Investment Objectives and Goals |
Dec. 31, 2025 |
|---|---|
| Oberweis Global Opportunities Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS GLOBAL OPPORTUNITIES FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis Global Opportunities Fund’s investment objective is to maximize capital appreciation. |
| Oberweis Micro-Cap Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS MICRO-CAP FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis Micro-Cap Fund’s investment objective is to maximize capital appreciation. |
| Oberweis Small-Cap Opportunities Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS SMALL-CAP OPPORTUNITIES FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis Small-Cap Opportunities Fund’s investment objective is to maximize capital appreciation. |
| Oberweis International Opportunities Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS INTERNATIONAL OPPORTUNITIES FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis International Opportunities Fund’s investment objective is to maximize long-term capital appreciation. |
| Oberweis China Opportunities Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS CHINA OPPORTUNITIES FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis China Opportunities Fund’s investment objective is to maximize long-term capital appreciation. |
| Oberweis Focused International Growth Fund | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | OBERWEIS FOCUSED INTERNATIONAL GROWTH FUND |
| Objective [Heading] | INVESTMENT OBJECTIVE |
| Objective, Primary [Text Block] | The Oberweis Focused International Growth Fund’s investment objective is to maximize long-term capital appreciation. |