Average Annual Total Returns
|
12 Months Ended |
60 Months Ended |
120 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
| MSCI ACWI ex USA IMI Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
31.96%
|
7.77%
|
8.37%
|
| MSCI ACWI ex USA Small Cap Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
29.26%
|
6.91%
|
8.13%
|
| Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Russell Microcap Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
22.98%
|
7.32%
|
9.58%
|
| Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.59%
|
8.88%
|
9.27%
|
| Russell 2000 Growth Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
13.01%
|
3.18%
|
9.57%
|
| Russell 2500 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
11.91%
|
7.26%
|
10.40%
|
| Russell 2500 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
[1] |
12.73%
|
10.02%
|
9.72%
|
| Royce Small-Cap Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.95%
|
8.38%
|
11.11%
|
| Royce Small-Cap Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
7.38%
|
5.92%
|
8.47%
|
| Royce Small-Cap Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
6.50%
|
6.27%
|
8.49%
|
| Royce Small-Cap Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.62%
|
8.05%
|
10.75%
|
| Royce Small-Cap Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.00%
|
8.45%
|
11.19%
|
| Royce International Premier Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.69%
|
(3.19%)
|
4.90%
|
| Royce International Premier Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.37%
|
(3.44%)
|
4.64%
|
| Royce International Premier Fund - Service Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.16%
|
(4.11%)
|
4.18%
|
| Royce International Premier Fund - Service Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.69%
|
(2.57%)
|
3.66%
|
| Royce International Premier Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.88%
|
(3.04%)
|
4.96%
|
| Royce Micro-Cap Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
13.33%
|
9.24%
|
10.43%
|
| Royce Micro-Cap Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.92%
|
6.32%
|
7.92%
|
| Royce Micro-Cap Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
10.47%
|
6.92%
|
7.98%
|
| Royce Micro-Cap Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
13.08%
|
8.95%
|
10.22%
|
| Royce Premier Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.63%
|
5.56%
|
10.34%
|
| Royce Premier Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.00%
|
2.97%
|
7.14%
|
| Royce Premier Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.32%
|
4.16%
|
7.81%
|
| Royce Premier Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.30%
|
5.26%
|
9.99%
|
| Royce Premier Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.59%
|
5.63%
|
10.41%
|
| Royce Small-Cap Opportunity Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
11.86%
|
9.87%
|
12.64%
|
| Royce Small-Cap Opportunity Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.61%
|
7.38%
|
10.54%
|
| Royce Small-Cap Opportunity Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.75%
|
7.37%
|
9.95%
|
| Royce Small-Cap Opportunity Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
11.58%
|
9.57%
|
12.35%
|
| Royce Small-Cap Opportunity Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
11.92%
|
9.96%
|
12.76%
|
| Royce Small-Cap Special Equity Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.34%
|
6.63%
|
7.93%
|
| Royce Small-Cap Special Equity Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
0.71%
|
3.74%
|
5.42%
|
| Royce Small-Cap Special Equity Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.97%
|
4.96%
|
6.04%
|
| Royce Small-Cap Special Equity Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.13%
|
6.36%
|
7.68%
|
| Royce Small-Cap Special Equity Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.41%
|
6.73%
|
8.01%
|
| Royce Small-Cap Total Return Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.43%
|
8.82%
|
9.37%
|
| Royce Small-Cap Total Return Fund - Investment Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
(0.30%)
|
5.02%
|
5.72%
|
| Royce Small-Cap Total Return Fund - Investment Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.44%
|
6.24%
|
6.75%
|
| Royce Small-Cap Total Return Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.13%
|
8.53%
|
9.07%
|
| Royce Small-Cap Total Return Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.54%
|
8.93%
|
9.49%
|
| Royce Small-Cap Value Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
7.03%
|
10.16%
|
7.94%
|
| Royce Small-Cap Value Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
6.68%
|
9.88%
|
7.68%
|
| Royce Small-Cap Value Fund - Service Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
4.42%
|
8.13%
|
6.11%
|
| Royce Small-Cap Value Fund - Service Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.69%
|
7.69%
|
5.94%
|
| Royce Smaller-Companies Growth Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
19.94%
|
4.71%
|
10.54%
|
| Royce Smaller-Companies Growth Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
19.34%
|
4.39%
|
10.22%
|
| Royce Smaller-Companies Growth Fund - Service Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
14.67%
|
1.62%
|
6.80%
|
| Royce Smaller-Companies Growth Fund - Service Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
13.76%
|
2.82%
|
7.28%
|
| Royce Smaller-Companies Growth Fund - Institutional Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
19.80%
|
4.72%
|
10.57%
|
| Royce Smid-Cap Total Return Fund - Investment Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
4.17%
|
9.94%
|
10.09%
|
| Royce Smid-Cap Total Return Fund - Service Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
4.00%
|
9.67%
|
9.81%
|
| Royce Smid-Cap Total Return Fund - Service Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
(13.12%)
|
3.67%
|
5.39%
|
| Royce Smid-Cap Total Return Fund - Service Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.38%
|
7.11%
|
7.27%
|
| Royce Micro-Cap Fund - Consultant Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Micro-Cap Fund - Consultant Class | Russell Microcap Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
22.98%
|
7.32%
|
9.58%
|
| Royce Micro-Cap Fund - Consultant Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Micro-Cap Fund - Consultant Class | Royce Micro-Cap Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.18%
|
8.08%
|
9.23%
|
| Royce Micro-Cap Fund - Consultant Class | Royce Micro-Cap Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.81%
|
5.18%
|
6.70%
|
| Royce Micro-Cap Fund - Consultant Class | Royce Micro-Cap Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
9.77%
|
6.02%
|
6.99%
|
| Royce Premier Fund - Consultant Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Premier Fund - Consultant Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Premier Fund - Consultant Class | Royce Premier Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
4.53%
|
4.43%
|
9.13%
|
| Royce Premier Fund - Consultant Class | Royce Premier Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
1.93%
|
1.87%
|
5.95%
|
| Royce Premier Fund - Consultant Class | Royce Premier Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
4.64%
|
3.31%
|
6.85%
|
| Royce Small-Cap Fund - Consultant Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Small-Cap Fund - Consultant Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Small-Cap Fund - Consultant Class | Royce Small-Cap Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
7.94%
|
7.31%
|
10.00%
|
| Royce Small-Cap Fund - Consultant Class | Royce Small-Cap Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
6.50%
|
4.95%
|
7.44%
|
| Royce Small-Cap Fund - Consultant Class | Royce Small-Cap Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.80%
|
5.46%
|
7.60%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.59%
|
8.88%
|
9.27%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Royce Small-Cap Opportunity Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
10.79%
|
8.72%
|
11.43%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Royce Small-Cap Opportunity Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.56%
|
6.28%
|
9.33%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Royce Small-Cap Opportunity Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.10%
|
6.48%
|
8.91%
|
| Royce Small-Cap Opportunity Fund - Consultant & R Class | Royce Small-Cap Opportunity Fund - R Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
11.21%
|
9.17%
|
11.94%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.59%
|
8.88%
|
9.27%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Royce Small-Cap Special Equity Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.29%
|
5.49%
|
6.78%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Royce Small-Cap Special Equity Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
(0.14%)
|
2.88%
|
4.51%
|
| Royce Small-Cap Special Equity Fund - Consultant Class | Royce Small-Cap Special Equity Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.20%
|
4.13%
|
5.18%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.59%
|
8.88%
|
9.27%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Royce Small-Cap Total Return Fund - Consultant Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
1.52%
|
7.75%
|
8.30%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Royce Small-Cap Total Return Fund - Consultant Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
(0.95%)
|
4.43%
|
5.08%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Royce Small-Cap Total Return Fund - Consultant Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.72%
|
5.58%
|
6.05%
|
| Royce Small-Cap Total Return Fund - Consultant & R Class | Royce Small-Cap Total Return Fund - R Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
1.80%
|
8.11%
|
8.67%
|
| Royce Premier Fund - A Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Premier Fund - A Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Premier Fund - A Class | Royce Premier Fund - A Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.30%
|
5.26%
|
9.99%
|
| Royce Premier Fund - A Class | Royce Premier Fund - A Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
2.67%
|
2.68%
|
6.83%
|
| Royce Premier Fund - A Class | Royce Premier Fund - A Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
5.12%
|
3.93%
|
7.55%
|
| Royce Small-Cap Fund - A Class | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Royce Small-Cap Fund - A Class | Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
| Royce Small-Cap Fund - A Class | Royce Small-Cap Fund - A Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
8.62%
|
8.05%
|
10.75%
|
| Royce Small-Cap Fund - A Class | Royce Small-Cap Fund - A Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
7.13%
|
5.64%
|
8.18%
|
| Royce Small-Cap Fund - A Class | Royce Small-Cap Fund - A Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
6.24%
|
6.02%
|
8.21%
|
| Royce Small-Cap Special Equity Fund - A Class | Royce Small-Cap Special Equity Fund - A Class |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.13%
|
6.36%
|
7.68%
|
| Royce Small-Cap Special Equity Fund - A Class | Royce Small-Cap Special Equity Fund - A Class | After Taxes on Distributions |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
0.58%
|
3.56%
|
5.24%
|
| Royce Small-Cap Special Equity Fund - A Class | Royce Small-Cap Special Equity Fund - A Class | After Taxes on Distributions and Sales |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
3.78%
|
4.77%
|
5.86%
|
| Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
17.15%
|
13.15%
|
14.29%
|
| Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) | Russell 2000 Value Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.59%
|
8.88%
|
9.27%
|
| Russell 2000 Index (Reflects no deductions for fees, expenses, or taxes) | Russell 3000 Index (Reflects no deductions for fees, expenses, or taxes) |
|
|
|
|
| Prospectus [Line Items] |
|
|
|
|
| Average Annual Return, Percent |
|
12.81%
|
6.09%
|
9.62%
|
|
|