v3.26.1
Average Annual Total Returns
 12 Months Ended 20 Months Ended 60 Months Ended 68 Months Ended 105 Months Ended 120 Months Ended
Apr. 30, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Driehaus Emerging Markets Growth Fund | MSCI Emerging Markets Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   33.57%   4.20%     8.42%
Driehaus Emerging Markets Growth Fund | MSCI Emerging Markets Growth Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [1]   34.30%   1.77%     8.76%
Driehaus Emerging Markets Growth Fund | Investor Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   29.92%   3.35%     9.05%
Driehaus Emerging Markets Growth Fund | Investor Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   29.28%   2.21%     8.22%
Driehaus Emerging Markets Growth Fund | Investor Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   17.96%   2.29%     7.19%
Driehaus Emerging Markets Growth Fund | Institutional Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   30.22%   3.59%     9.25%
Driehaus Emerging Markets Small Cap Growth Fund | MSCI Emerging Markets Index Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   33.57%   4.20%     8.42%
Driehaus Emerging Markets Small Cap Growth Fund | MSCI Emerging Markets Small Cap Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [2]   18.58%   8.43%     8.31%
Driehaus Emerging Markets Small Cap Growth Fund | MSCI Emerging Markets Small Cap Growth Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [3]   18.28%   7.15%     7.15%
Driehaus Emerging Markets Small Cap Growth Fund | Driehaus Emerging Markets Small Cap Growth Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   24.06%   7.51%     8.87%
Driehaus Emerging Markets Small Cap Growth Fund | Driehaus Emerging Markets Small Cap Growth Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   23.06%   7.22%     8.69%
Driehaus Emerging Markets Small Cap Growth Fund | Driehaus Emerging Markets Small Cap Growth Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   14.37%   5.80%     7.21%
Driehaus Global Fund | MSCI ACWI Index Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   22.34%   11.19%   11.74%  
Performance Inception Date Apr. 10, 2017            
Driehaus Global Fund | Driehaus Global Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   22.59%   8.36%   11.00%  
Performance Inception Date Apr. 10, 2017            
Driehaus Global Fund | Driehaus Global Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   18.19%   6.51%   9.52%  
Performance Inception Date Apr. 10, 2017            
Driehaus Global Fund | Driehaus Global Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   15.13%   6.04%   8.49%  
Performance Inception Date Apr. 10, 2017            
Driehaus International Small Cap Growth Fund | MSCI All Country World ex USA Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   32.38%   7.91%     8.41%
Driehaus International Small Cap Growth Fund | MSCI All Country World ex USA Small Cap Growth Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [4]   26.16%   4.12%     7.46%
Driehaus International Small Cap Growth Fund | Driehaus International Small Cap Growth Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   28.92%   4.83%     8.97%
Driehaus International Small Cap Growth Fund | Driehaus International Small Cap Growth Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   28.59%   2.87%     6.83%
Driehaus International Small Cap Growth Fund | Driehaus International Small Cap Growth Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   17.35%   3.13%     6.52%
Driehaus International Developed Equity Fund | MSCI World ex USA Index - Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   31.85% 19.30%        
Performance Inception Date Apr. 30, 2024            
Driehaus International Developed Equity Fund | MSCI World ex USA Growth Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [5]   21.94% 12.67%        
Performance Inception Date Apr. 30, 2024            
Driehaus International Developed Equity Fund | Driehaus International Developed Equity Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   25.60% 14.26%        
Performance Inception Date Apr. 30, 2024            
Driehaus International Developed Equity Fund | Driehaus International Developed Equity Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   25.10% 13.94%        
Performance Inception Date Apr. 30, 2024            
Driehaus International Developed Equity Fund | Driehaus International Developed Equity Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   15.50% 10.97%        
Performance Inception Date Apr. 30, 2024            
Driehaus Micro Cap Growth Fund | Russell 3000® Index (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   17.15%   13.15%     14.29%
Driehaus Micro Cap Growth Fund | Russell Microcap® Growth Index (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [6]   21.84%   2.81%     7.82%
Driehaus Micro Cap Growth Fund | Driehaus Micro Cap Growth Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   30.88%   9.57%     19.56%
Driehaus Micro Cap Growth Fund | Driehaus Micro Cap Growth Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   26.93%   5.81%     15.46%
Driehaus Micro Cap Growth Fund | Driehaus Micro Cap Growth Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   20.78%   6.33%     14.92%
Driehaus Small Cap Growth Fund | Russell 3000® Index (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   17.15%   13.15%     14.29%
Driehaus Small Cap Growth Fund | Russell 2000® Growth Index (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [7]   13.01%   3.18%     9.57%
Driehaus Small Cap Growth Fund | Investor Share Class              
Prospectus [Line Items]              
Average Annual Return, Percent   16.66%   7.13%     17.09%
Driehaus Small Cap Growth Fund | Investor Share Class | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   16.57%   5.73%     15.70%
Driehaus Small Cap Growth Fund | Investor Share Class | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   9.88%   5.09%     14.01%
Driehaus Small Cap Growth Fund | Institutional Share Class              
Prospectus [Line Items]              
Average Annual Return, Percent   16.95%   7.39%     17.35%
Driehaus Small/Mid Cap Growth Fund | Russell 3000® Index (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent   17.15%   13.15% 18.19%    
Performance Inception Date May 01, 2020            
Driehaus Small/Mid Cap Growth Fund | Russell 2500® Growth Index – Net (reflects no deduction for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent [8]   10.31%   2.98% 11.82%    
Performance Inception Date May 01, 2020            
Driehaus Small/Mid Cap Growth Fund | Driehaus Small/Mid Cap Growth Fund Shares              
Prospectus [Line Items]              
Average Annual Return, Percent   9.83%   6.34% 16.43%    
Performance Inception Date May 01, 2020            
Driehaus Small/Mid Cap Growth Fund | Driehaus Small/Mid Cap Growth Fund Shares | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   9.67%   5.52% 15.53%    
Performance Inception Date May 01, 2020            
Driehaus Small/Mid Cap Growth Fund | Driehaus Small/Mid Cap Growth Fund Shares | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   5.84%   4.64% 13.04%    
Performance Inception Date May 01, 2020            
[1] The additional index shows how the Fund’s performance compares with the returns of an index with a growth bias.
[2] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.
[3] The additional index shows how the Fund’s performance compares with the returns of an index with a growth bias.
[4] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.
[5] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.
[6] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.
[7] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.
[8] The additional index shows how the Fund’s performance compares with the returns of an index with characteristics relevant to the Fund.