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Shareholder Report, Holdings (Details)

Dec. 31, 2025

Royce Small-Cap Fund - Consultant Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Fund - Consultant Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.50%

Royce Small-Cap Fund - Consultant Class | Element Solutions [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Fund - Consultant Class | Cirrus Logic [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Consultant Class | SEI Investments [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Consultant Class | E-L Financial [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Consultant Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Consultant Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Consultant Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Consultant Class | Digi International [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.10%

Royce Small-Cap Fund - Consultant Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

29.10%

Royce Small-Cap Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.20%

Royce Small-Cap Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

16.50%

Royce Small-Cap Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.70%

Royce Small-Cap Fund - Consultant Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.60%

Royce Small-Cap Fund - Consultant Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.10%

Royce Small-Cap Fund - Consultant Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Fund - Investment Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Fund - Investment Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.50%

Royce Small-Cap Fund - Investment Class | Element Solutions [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Fund - Investment Class | Cirrus Logic [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Investment Class | SEI Investments [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Investment Class | E-L Financial [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Investment Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Investment Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Investment Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Investment Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

29.10%

Royce Small-Cap Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.20%

Royce Small-Cap Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

16.50%

Royce Small-Cap Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.70%

Royce Small-Cap Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.60%

Royce Small-Cap Fund - Investment Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.10%

Royce Small-Cap Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Fund - Institutional Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Fund - Institutional Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.50%

Royce Small-Cap Fund - Institutional Class | Element Solutions [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Fund - Institutional Class | Cirrus Logic [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Institutional Class | SEI Investments [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Institutional Class | E-L Financial [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Institutional Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Institutional Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Institutional Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Institutional Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

29.10%

Royce Small-Cap Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.20%

Royce Small-Cap Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

16.50%

Royce Small-Cap Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.70%

Royce Small-Cap Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.60%

Royce Small-Cap Fund - Institutional Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.10%

Royce Small-Cap Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Fund - Service Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Fund - Service Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.50%

Royce Small-Cap Fund - Service Class | Element Solutions [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Fund - Service Class | Cirrus Logic [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Service Class | SEI Investments [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Small-Cap Fund - Service Class | E-L Financial [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Service Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Fund - Service Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Service Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Service Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

29.10%

Royce Small-Cap Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.20%

Royce Small-Cap Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

16.50%

Royce Small-Cap Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.70%

Royce Small-Cap Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.60%

Royce Small-Cap Fund - Service Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.10%

Royce Small-Cap Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce SMid-Cap Total Return Fund - Institutional Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.80%

Royce SMid-Cap Total Return Fund - Institutional Class | FTAI Aviation [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.10%

Royce SMid-Cap Total Return Fund - Institutional Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.60%

Royce SMid-Cap Total Return Fund - Institutional Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.50%

Royce SMid-Cap Total Return Fund - Institutional Class | Kyndryl Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.50%

Royce SMid-Cap Total Return Fund - Institutional Class | Vontier Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce SMid-Cap Total Return Fund - Institutional Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce SMid-Cap Total Return Fund - Institutional Class | AptarGroup [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce SMid-Cap Total Return Fund - Institutional Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce SMid-Cap Total Return Fund - Institutional Class | Silgan Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce SMid-Cap Total Return Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.00%

Royce SMid-Cap Total Return Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

26.70%

Royce SMid-Cap Total Return Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.70%

Royce SMid-Cap Total Return Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce SMid-Cap Total Return Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce SMid-Cap Total Return Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

15.90%

Royce SMid-Cap Total Return Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce SMid-Cap Total Return Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce SMid-Cap Total Return Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.70%

Royce SMid-Cap Total Return Fund - Service Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.80%

Royce SMid-Cap Total Return Fund - Service Class | FTAI Aviation [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.10%

Royce SMid-Cap Total Return Fund - Service Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.60%

Royce SMid-Cap Total Return Fund - Service Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.50%

Royce SMid-Cap Total Return Fund - Service Class | Kyndryl Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.50%

Royce SMid-Cap Total Return Fund - Service Class | Vontier Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce SMid-Cap Total Return Fund - Service Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce SMid-Cap Total Return Fund - Service Class | AptarGroup [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce SMid-Cap Total Return Fund - Service Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce SMid-Cap Total Return Fund - Service Class | Silgan Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce SMid-Cap Total Return Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.00%

Royce SMid-Cap Total Return Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

26.70%

Royce SMid-Cap Total Return Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.70%

Royce SMid-Cap Total Return Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce SMid-Cap Total Return Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce SMid-Cap Total Return Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

15.90%

Royce SMid-Cap Total Return Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce SMid-Cap Total Return Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce SMid-Cap Total Return Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.70%

Royce International Premier Fund - Investment Class | Diploma [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce International Premier Fund - Investment Class | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

21.50%

^[1],[2]

Royce International Premier Fund - Investment Class | DiscoverIE Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Investment Class | Riken Keiki [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Investment Class | Gaztransport Et Technigaz [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | USS [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | BML [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | Maruwa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | CTS Eventim AG & Co. [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Investment Class | Zuken [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Investment Class | OBIC Business Consultants [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.60%

Royce International Premier Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.30%

Royce International Premier Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

28.90%

Royce International Premier Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.50%

Royce International Premier Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce International Premier Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Investment Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce International Premier Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.80%

Royce International Premier Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.10%

Royce International Premier Fund - Investment Class | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

17.10%

^[1],[2]

Royce International Premier Fund - Investment Class | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

8.90%

^[1],[2]

Royce International Premier Fund - Investment Class | SWITZERLAND

Holdings [Line Items]

Percent of Net Asset Value

6.10%

^[1],[2]

Royce International Premier Fund - Investment Class | GERMANY

Holdings [Line Items]

Percent of Net Asset Value

4.70%

^[1],[2]

Royce International Premier Fund - Investment Class | SWEDEN

Holdings [Line Items]

Percent of Net Asset Value

4.30%

^[1],[2]

Royce International Premier Fund - Investment Class | ITALY

Holdings [Line Items]

Percent of Net Asset Value

3.70%

^[1],[2]

Royce International Premier Fund - Investment Class | ISRAEL

Holdings [Line Items]

Percent of Net Asset Value

3.60%

^[1],[2]

Royce International Premier Fund - Investment Class | CANADA

Holdings [Line Items]

Percent of Net Asset Value

3.40%

^[1],[2]

Royce International Premier Fund - Investment Class | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

3.00%

^[1],[2]

Royce International Premier Fund - Institutional Class | Diploma [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce International Premier Fund - Institutional Class | DiscoverIE Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Institutional Class | Riken Keiki [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Institutional Class | Gaztransport Et Technigaz [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | USS [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | BML [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | Maruwa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | CTS Eventim AG & Co. [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Institutional Class | Zuken [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Institutional Class | OBIC Business Consultants [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.60%

Royce International Premier Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.30%

Royce International Premier Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

28.90%

Royce International Premier Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.50%

Royce International Premier Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce International Premier Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Institutional Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce International Premier Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.80%

Royce International Premier Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.10%

Royce International Premier Fund - Institutional Class | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

17.10%

^[3],[4]

Royce International Premier Fund - Institutional Class | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

8.90%

^[3],[4]

Royce International Premier Fund - Institutional Class | SWITZERLAND

Holdings [Line Items]

Percent of Net Asset Value

6.10%

^[3],[4]

Royce International Premier Fund - Institutional Class | GERMANY

Holdings [Line Items]

Percent of Net Asset Value

4.70%

^[3],[4]

Royce International Premier Fund - Institutional Class | SWEDEN

Holdings [Line Items]

Percent of Net Asset Value

4.30%

^[3],[4]

Royce International Premier Fund - Institutional Class | ITALY

Holdings [Line Items]

Percent of Net Asset Value

3.70%

^[3],[4]

Royce International Premier Fund - Institutional Class | ISRAEL

Holdings [Line Items]

Percent of Net Asset Value

3.60%

^[3],[4]

Royce International Premier Fund - Institutional Class | CANADA

Holdings [Line Items]

Percent of Net Asset Value

3.40%

^[3],[4]

Royce International Premier Fund - Institutional Class | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

3.00%

^[3],[4]

Royce International Premier Fund - Institutional Class | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

21.50%

^[3],[4]

Royce International Premier Fund - Service Class | Diploma [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce International Premier Fund - Service Class | DiscoverIE Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Service Class | Riken Keiki [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce International Premier Fund - Service Class | Gaztransport Et Technigaz [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | USS [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | BML [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | Maruwa [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | CTS Eventim AG & Co. [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Service Class | Zuken [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Service Class | OBIC Business Consultants [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce International Premier Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

30.60%

Royce International Premier Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.30%

Royce International Premier Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

28.90%

Royce International Premier Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.50%

Royce International Premier Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce International Premier Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce International Premier Fund - Service Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce International Premier Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.80%

Royce International Premier Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.10%

Royce International Premier Fund - Service Class | UNITED KINGDOM

Holdings [Line Items]

Percent of Net Asset Value

17.10%

^[5],[6]

Royce International Premier Fund - Service Class | FRANCE

Holdings [Line Items]

Percent of Net Asset Value

8.90%

^[5],[6]

Royce International Premier Fund - Service Class | SWITZERLAND

Holdings [Line Items]

Percent of Net Asset Value

6.10%

^[5],[6]

Royce International Premier Fund - Service Class | GERMANY

Holdings [Line Items]

Percent of Net Asset Value

4.70%

^[5],[6]

Royce International Premier Fund - Service Class | SWEDEN

Holdings [Line Items]

Percent of Net Asset Value

4.30%

^[5],[6]

Royce International Premier Fund - Service Class | ITALY

Holdings [Line Items]

Percent of Net Asset Value

3.70%

^[5],[6]

Royce International Premier Fund - Service Class | ISRAEL

Holdings [Line Items]

Percent of Net Asset Value

3.60%

^[5],[6]

Royce International Premier Fund - Service Class | CANADA

Holdings [Line Items]

Percent of Net Asset Value

3.40%

^[5],[6]

Royce International Premier Fund - Service Class | AUSTRALIA

Holdings [Line Items]

Percent of Net Asset Value

3.00%

^[5],[6]

Royce International Premier Fund - Service Class | JAPAN

Holdings [Line Items]

Percent of Net Asset Value

21.50%

^[5],[6]

Royce Micro-Cap Fund - Consultant Class | Establishment Labs Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Consultant Class | Sprott [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Consultant Class | Natural Gas Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Consultant Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Consultant Class | LightPath Technologies Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Consultant Class | Bel Fuse Cl. B [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Consultant Class | Investar Holding [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Consultant Class | nLIGHT [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Consultant Class | NWPX Infrastructure [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Consultant Class | NPK International [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Micro-Cap Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

15.70%

Royce Micro-Cap Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.30%

Royce Micro-Cap Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.80%

Royce Micro-Cap Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.30%

Royce Micro-Cap Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Micro-Cap Fund - Consultant Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Micro-Cap Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Micro-Cap Fund - Consultant Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Micro-Cap Fund - Consultant Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce Micro-Cap Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Micro-Cap Fund - Investment Class | Establishment Labs Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Investment Class | Sprott [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Investment Class | Natural Gas Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Investment Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Investment Class | LightPath Technologies Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Investment Class | Bel Fuse Cl. B [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Investment Class | Investar Holding [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Investment Class | nLIGHT [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Investment Class | NWPX Infrastructure [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Investment Class | NPK International [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Micro-Cap Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

15.70%

Royce Micro-Cap Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.30%

Royce Micro-Cap Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.80%

Royce Micro-Cap Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.30%

Royce Micro-Cap Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Micro-Cap Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Micro-Cap Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Micro-Cap Fund - Investment Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Micro-Cap Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce Micro-Cap Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Micro-Cap Fund - Service Class | Establishment Labs Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Service Class | Sprott [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Service Class | Natural Gas Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Service Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Service Class | LightPath Technologies Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.30%

Royce Micro-Cap Fund - Service Class | Bel Fuse Cl. B [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Service Class | Investar Holding [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Service Class | nLIGHT [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Service Class | NWPX Infrastructure [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Service Class | NPK International [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Micro-Cap Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Micro-Cap Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

15.70%

Royce Micro-Cap Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.30%

Royce Micro-Cap Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.80%

Royce Micro-Cap Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.30%

Royce Micro-Cap Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Micro-Cap Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Micro-Cap Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Micro-Cap Fund - Service Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Micro-Cap Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.50%

Royce Micro-Cap Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Small-Cap Opportunity Fund - Consultant Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Consultant Class | TETRA Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Consultant Class | DNOW [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Consultant Class | Capstone Copper [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Consultant Class | Resideo Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | Select Water Solutions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | Astronics Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | FormFactor [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | Orion Group Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | BankUnited [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Small-Cap Opportunity Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.20%

Royce Small-Cap Opportunity Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.70%

Royce Small-Cap Opportunity Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.60%

Royce Small-Cap Opportunity Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Opportunity Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.90%

Royce Small-Cap Opportunity Fund - Consultant Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Opportunity Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.30%

Royce Small-Cap Opportunity Fund - Consultant Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Opportunity Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Opportunity Fund - Investment Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Investment Class | TETRA Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Investment Class | DNOW [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Investment Class | Capstone Copper [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Investment Class | Resideo Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | Select Water Solutions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | Astronics Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | FormFactor [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | Orion Group Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | BankUnited [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Small-Cap Opportunity Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.20%

Royce Small-Cap Opportunity Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.70%

Royce Small-Cap Opportunity Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.60%

Royce Small-Cap Opportunity Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Opportunity Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.90%

Royce Small-Cap Opportunity Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Opportunity Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.30%

Royce Small-Cap Opportunity Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Opportunity Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Opportunity Fund - Institutional Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Institutional Class | TETRA Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Institutional Class | DNOW [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Institutional Class | Capstone Copper [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Institutional Class | Resideo Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | Select Water Solutions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | Astronics Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | FormFactor [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | Orion Group Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | BankUnited [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Small-Cap Opportunity Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.20%

Royce Small-Cap Opportunity Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.70%

Royce Small-Cap Opportunity Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.60%

Royce Small-Cap Opportunity Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Opportunity Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.90%

Royce Small-Cap Opportunity Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Opportunity Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.30%

Royce Small-Cap Opportunity Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Opportunity Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Opportunity Fund - R Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - R Class | TETRA Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - R Class | DNOW [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - R Class | Capstone Copper [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - R Class | Resideo Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | Select Water Solutions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | Astronics Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | FormFactor [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | Orion Group Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | BankUnited [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - R Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Small-Cap Opportunity Fund - R Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.20%

Royce Small-Cap Opportunity Fund - R Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.70%

Royce Small-Cap Opportunity Fund - R Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.60%

Royce Small-Cap Opportunity Fund - R Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Opportunity Fund - R Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.90%

Royce Small-Cap Opportunity Fund - R Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Opportunity Fund - R Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.30%

Royce Small-Cap Opportunity Fund - R Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Opportunity Fund - R Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Opportunity Fund - Service Class | CECO Environmental [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Service Class | TETRA Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Service Class | DNOW [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Service Class | Capstone Copper [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Opportunity Fund - Service Class | Resideo Technologies [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | Select Water Solutions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | Astronics Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | FormFactor [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | Orion Group Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | BankUnited [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.80%

Royce Small-Cap Opportunity Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

Royce Small-Cap Opportunity Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.20%

Royce Small-Cap Opportunity Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.70%

Royce Small-Cap Opportunity Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.60%

Royce Small-Cap Opportunity Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Opportunity Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.90%

Royce Small-Cap Opportunity Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.20%

Royce Small-Cap Opportunity Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.30%

Royce Small-Cap Opportunity Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Opportunity Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Premier Fund - Consultant Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Consultant Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Consultant Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Consultant Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Consultant Class | MKS [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Premier Fund - Consultant Class | RBC Bearings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Consultant Class | Stella-Jones [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Consultant Class | Colliers International Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Consultant Class | FirstService Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Consultant Class | TMX Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

39.50%

Royce Premier Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

Royce Premier Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.70%

Royce Premier Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Premier Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.00%

Royce Premier Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

Royce Premier Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Premier Fund - Consultant Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

Royce Premier Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Premier Fund - Investment Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Investment Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Investment Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Investment Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Investment Class | MKS [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Premier Fund - Investment Class | RBC Bearings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Investment Class | Stella-Jones [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Investment Class | Colliers International Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Investment Class | FirstService Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Investment Class | TMX Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

39.50%

Royce Premier Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

Royce Premier Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.70%

Royce Premier Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Premier Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.00%

Royce Premier Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

Royce Premier Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Premier Fund - Investment Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

Royce Premier Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Premier Fund - Institutional Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Institutional Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Institutional Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Institutional Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Institutional Class | MKS [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Premier Fund - Institutional Class | RBC Bearings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Institutional Class | Stella-Jones [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Institutional Class | Colliers International Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Institutional Class | FirstService Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Institutional Class | TMX Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

39.50%

Royce Premier Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

Royce Premier Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.70%

Royce Premier Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Premier Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.00%

Royce Premier Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

Royce Premier Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Premier Fund - Institutional Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

Royce Premier Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Premier Fund - Service Class | Arcosa [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Service Class | ESAB Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Service Class | JBT Marel [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

Royce Premier Fund - Service Class | Quaker Houghton [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Service Class | MKS [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.20%

Royce Premier Fund - Service Class | RBC Bearings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Service Class | Stella-Jones [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Service Class | Colliers International Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.30%

Royce Premier Fund - Service Class | FirstService Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Service Class | TMX Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Premier Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

39.50%

Royce Premier Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

Royce Premier Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.70%

Royce Premier Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Premier Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.00%

Royce Premier Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.50%

Royce Premier Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Premier Fund - Service Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

Royce Premier Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Small-Cap Special Equity Fund - Consultant Class | Standard Motor Products [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

Royce Small-Cap Special Equity Fund - Consultant Class | Mueller Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Consultant Class | TEGNA [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Consultant Class | Diamond Hill Investment Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Consultant Class | Ennis [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Consultant Class | Movado Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Consultant Class | Ingles Markets Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.70%

Royce Small-Cap Special Equity Fund - Consultant Class | Vishay Intertechnology [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Consultant Class | Macy’s [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Consultant Class | John B. Sanfilippo & Son [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.00%

Royce Small-Cap Special Equity Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.60%

Royce Small-Cap Special Equity Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.60%

Royce Small-Cap Special Equity Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Small-Cap Special Equity Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.30%

Royce Small-Cap Special Equity Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.40%

Royce Small-Cap Special Equity Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.00%

Royce Small-Cap Special Equity Fund - Consultant Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Special Equity Fund - Consultant Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.80%

Royce Small-Cap Special Equity Fund - Investment Class | Standard Motor Products [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

Royce Small-Cap Special Equity Fund - Investment Class | Mueller Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Investment Class | TEGNA [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Investment Class | Diamond Hill Investment Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Investment Class | Ennis [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Investment Class | Movado Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Investment Class | Ingles Markets Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.70%

Royce Small-Cap Special Equity Fund - Investment Class | Vishay Intertechnology [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Investment Class | Macy’s [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Investment Class | John B. Sanfilippo & Son [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.00%

Royce Small-Cap Special Equity Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.60%

Royce Small-Cap Special Equity Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.60%

Royce Small-Cap Special Equity Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Small-Cap Special Equity Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.30%

Royce Small-Cap Special Equity Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.40%

Royce Small-Cap Special Equity Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.00%

Royce Small-Cap Special Equity Fund - Investment Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Special Equity Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.80%

Royce Small-Cap Special Equity Fund - Institutional Class | Standard Motor Products [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

Royce Small-Cap Special Equity Fund - Institutional Class | Mueller Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Institutional Class | TEGNA [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Institutional Class | Diamond Hill Investment Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Institutional Class | Ennis [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Institutional Class | Movado Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Institutional Class | Ingles Markets Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.70%

Royce Small-Cap Special Equity Fund - Institutional Class | Vishay Intertechnology [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Institutional Class | Macy’s [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Institutional Class | John B. Sanfilippo & Son [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.00%

Royce Small-Cap Special Equity Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.60%

Royce Small-Cap Special Equity Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.60%

Royce Small-Cap Special Equity Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Small-Cap Special Equity Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.30%

Royce Small-Cap Special Equity Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.40%

Royce Small-Cap Special Equity Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.00%

Royce Small-Cap Special Equity Fund - Institutional Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Special Equity Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.80%

Royce Small-Cap Special Equity Fund - Service Class | Standard Motor Products [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

Royce Small-Cap Special Equity Fund - Service Class | Mueller Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Service Class | TEGNA [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Service Class | Diamond Hill Investment Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Service Class | Ennis [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Service Class | Movado Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.80%

Royce Small-Cap Special Equity Fund - Service Class | Ingles Markets Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.70%

Royce Small-Cap Special Equity Fund - Service Class | Vishay Intertechnology [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Service Class | Macy’s [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.60%

Royce Small-Cap Special Equity Fund - Service Class | John B. Sanfilippo & Son [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.00%

Royce Small-Cap Special Equity Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

20.60%

Royce Small-Cap Special Equity Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.60%

Royce Small-Cap Special Equity Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.00%

Royce Small-Cap Special Equity Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

Royce Small-Cap Special Equity Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.30%

Royce Small-Cap Special Equity Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.40%

Royce Small-Cap Special Equity Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

10.00%

Royce Small-Cap Special Equity Fund - Service Class | Real Estate Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

Royce Small-Cap Special Equity Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Special Equity Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.80%

Royce Small-Cap Total Return Fund - Consultant Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Total Return Fund - Consultant Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce Small-Cap Total Return Fund - Consultant Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Consultant Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Consultant Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Consultant Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Consultant Class | Hackett Group (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Small-Cap Total Return Fund - Consultant Class | Ingevity Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce Small-Cap Total Return Fund - Consultant Class | Barrett Business Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Consultant Class | Healthcare Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce Small-Cap Total Return Fund - Consultant Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.80%

Royce Small-Cap Total Return Fund - Consultant Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.30%

Royce Small-Cap Total Return Fund - Consultant Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Total Return Fund - Consultant Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Total Return Fund - Consultant Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.90%

Royce Small-Cap Total Return Fund - Consultant Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.30%

Royce Small-Cap Total Return Fund - Consultant Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Consultant Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.70%

Royce Small-Cap Total Return Fund - Consultant Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Total Return Fund - Consultant Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Total Return Fund - Investment Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Total Return Fund - Investment Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce Small-Cap Total Return Fund - Investment Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Investment Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Investment Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Investment Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Investment Class | Hackett Group (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Small-Cap Total Return Fund - Investment Class | Ingevity Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce Small-Cap Total Return Fund - Investment Class | Barrett Business Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Investment Class | Healthcare Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce Small-Cap Total Return Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.80%

Royce Small-Cap Total Return Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.30%

Royce Small-Cap Total Return Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Total Return Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Total Return Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.90%

Royce Small-Cap Total Return Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.30%

Royce Small-Cap Total Return Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.70%

Royce Small-Cap Total Return Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Total Return Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Total Return Fund - Institutional Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Total Return Fund - Institutional Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce Small-Cap Total Return Fund - Institutional Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Institutional Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Institutional Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Institutional Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Institutional Class | Hackett Group (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Small-Cap Total Return Fund - Institutional Class | Ingevity Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce Small-Cap Total Return Fund - Institutional Class | Barrett Business Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Institutional Class | Healthcare Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce Small-Cap Total Return Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.80%

Royce Small-Cap Total Return Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.30%

Royce Small-Cap Total Return Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Total Return Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Total Return Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.90%

Royce Small-Cap Total Return Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.30%

Royce Small-Cap Total Return Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.70%

Royce Small-Cap Total Return Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Total Return Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Total Return Fund - R Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Total Return Fund - R Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce Small-Cap Total Return Fund - R Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - R Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - R Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - R Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - R Class | Hackett Group (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Small-Cap Total Return Fund - R Class | Ingevity Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce Small-Cap Total Return Fund - R Class | Barrett Business Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - R Class | Healthcare Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce Small-Cap Total Return Fund - R Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.80%

Royce Small-Cap Total Return Fund - R Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.30%

Royce Small-Cap Total Return Fund - R Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Total Return Fund - R Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Total Return Fund - R Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.90%

Royce Small-Cap Total Return Fund - R Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.30%

Royce Small-Cap Total Return Fund - R Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - R Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.70%

Royce Small-Cap Total Return Fund - R Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Total Return Fund - R Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Small-Cap Total Return Fund - Service Class | Assured Guaranty [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Small-Cap Total Return Fund - Service Class | International General Insurance Holdings [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.10%

Royce Small-Cap Total Return Fund - Service Class | Advance Auto Parts [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Service Class | Academy Sports & Outdoors [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.90%

Royce Small-Cap Total Return Fund - Service Class | MSC Industrial Direct Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Service Class | Kulicke & Soffa Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Service Class | Hackett Group (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.00%

Royce Small-Cap Total Return Fund - Service Class | Ingevity Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.80%

Royce Small-Cap Total Return Fund - Service Class | Barrett Business Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.70%

Royce Small-Cap Total Return Fund - Service Class | Healthcare Services Group [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.40%

Royce Small-Cap Total Return Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.80%

Royce Small-Cap Total Return Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.30%

Royce Small-Cap Total Return Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.00%

Royce Small-Cap Total Return Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Small-Cap Total Return Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.90%

Royce Small-Cap Total Return Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.30%

Royce Small-Cap Total Return Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Small-Cap Total Return Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.70%

Royce Small-Cap Total Return Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

Royce Small-Cap Total Return Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.90%

Royce Smaller-Companies Growth Fund - Investment Class | Axsome Therapeutics [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Smaller-Companies Growth Fund - Investment Class | Strata Critical Medical [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Investment Class | Seacoast Banking Corporation of Florida [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Investment Class | Flotek Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Investment Class | Magnite [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Investment Class | Guardian Pharmacy Services Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Investment Class | ACV Auctions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Investment Class | SI-BONE [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Investment Class | BrightSpring Health Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Investment Class | JFrog [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Smaller-Companies Growth Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

17.00%

Royce Smaller-Companies Growth Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.70%

Royce Smaller-Companies Growth Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.40%

Royce Smaller-Companies Growth Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.10%

Royce Smaller-Companies Growth Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

Royce Smaller-Companies Growth Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

Royce Smaller-Companies Growth Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Smaller-Companies Growth Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.00%

Royce Smaller-Companies Growth Fund - Investment Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce Smaller-Companies Growth Fund - Investment Class | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Smaller-Companies Growth Fund - Institutional Class | Axsome Therapeutics [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Smaller-Companies Growth Fund - Institutional Class | Strata Critical Medical [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Institutional Class | Seacoast Banking Corporation of Florida [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Institutional Class | Flotek Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Institutional Class | Magnite [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Institutional Class | Guardian Pharmacy Services Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Institutional Class | ACV Auctions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Institutional Class | SI-BONE [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Institutional Class | BrightSpring Health Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Institutional Class | JFrog [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Smaller-Companies Growth Fund - Institutional Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

17.00%

Royce Smaller-Companies Growth Fund - Institutional Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.70%

Royce Smaller-Companies Growth Fund - Institutional Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.40%

Royce Smaller-Companies Growth Fund - Institutional Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.10%

Royce Smaller-Companies Growth Fund - Institutional Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

Royce Smaller-Companies Growth Fund - Institutional Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

Royce Smaller-Companies Growth Fund - Institutional Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Smaller-Companies Growth Fund - Institutional Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.00%

Royce Smaller-Companies Growth Fund - Institutional Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Institutional Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce Smaller-Companies Growth Fund - Institutional Class | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Smaller-Companies Growth Fund - Service Class | Axsome Therapeutics [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.60%

Royce Smaller-Companies Growth Fund - Service Class | Strata Critical Medical [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Service Class | Seacoast Banking Corporation of Florida [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Service Class | Flotek Industries [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.30%

Royce Smaller-Companies Growth Fund - Service Class | Magnite [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Service Class | Guardian Pharmacy Services Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Service Class | ACV Auctions Cl. A [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Service Class | SI-BONE [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Service Class | BrightSpring Health Services [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Smaller-Companies Growth Fund - Service Class | JFrog [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Smaller-Companies Growth Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

17.00%

Royce Smaller-Companies Growth Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.70%

Royce Smaller-Companies Growth Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

21.40%

Royce Smaller-Companies Growth Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.10%

Royce Smaller-Companies Growth Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

7.00%

Royce Smaller-Companies Growth Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.10%

Royce Smaller-Companies Growth Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.20%

Royce Smaller-Companies Growth Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.00%

Royce Smaller-Companies Growth Fund - Service Class | Communications Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.20%

Royce Smaller-Companies Growth Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.40%

Royce Smaller-Companies Growth Fund - Service Class | Utilities Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.90%

Royce Small-Cap Value Fund - Investment Class | Diebold Nixdorf [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Small-Cap Value Fund - Investment Class | Catalyst Pharmaceuticals [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Small-Cap Value Fund - Investment Class | IBEX [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Small-Cap Value Fund - Investment Class | TD SYNNEX [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Small-Cap Value Fund - Investment Class | Timberland Bancorp [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | Lear Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | M/I Homes [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | Unity Bancorp [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | Buckle (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | Interface [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Investment Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.40%

Royce Small-Cap Value Fund - Investment Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

28.30%

Royce Small-Cap Value Fund - Investment Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.70%

Royce Small-Cap Value Fund - Investment Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.10%

Royce Small-Cap Value Fund - Investment Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.50%

Royce Small-Cap Value Fund - Investment Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Value Fund - Investment Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.70%

Royce Small-Cap Value Fund - Investment Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.70%

Royce Small-Cap Value Fund - Investment Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.20%

Royce Small-Cap Value Fund - Service Class | Diebold Nixdorf [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.10%

Royce Small-Cap Value Fund - Service Class | Catalyst Pharmaceuticals [Member]

Holdings [Line Items]

Percent of Net Asset Value

2.00%

Royce Small-Cap Value Fund - Service Class | IBEX [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Small-Cap Value Fund - Service Class | TD SYNNEX [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.90%

Royce Small-Cap Value Fund - Service Class | Timberland Bancorp [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | Lear Corporation [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | M/I Homes [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | Unity Bancorp [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | Buckle (The) [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | Interface [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.80%

Royce Small-Cap Value Fund - Service Class | Industrial Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.40%

Royce Small-Cap Value Fund - Service Class | Financial Services Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

28.30%

Royce Small-Cap Value Fund - Service Class | Information Technology Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.70%

Royce Small-Cap Value Fund - Service Class | Healthcare Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.10%

Royce Small-Cap Value Fund - Service Class | Consumer Discretionary Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

22.50%

Royce Small-Cap Value Fund - Service Class | Materials Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

Royce Small-Cap Value Fund - Service Class | Energy Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.70%

Royce Small-Cap Value Fund - Service Class | Consumer Staples Sector [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.70%

Royce Small-Cap Value Fund - Service Class | Cash and Cash Equivalents [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.20%

[1]	Represents countries that are 3% or more of net assets.
[2]	Securities are categorized by the country of their headquarters.
[3]	Represents countries that are 3% or more of net assets.
[4]	Securities are categorized by the country of their headquarters.
[5]	Represents countries that are 3% or more of net assets.
[6]	Securities are categorized by the country of their headquarters.