v3.26.1
Average Annual Total Returns
 12 Months Ended 49 Months Ended 60 Months Ended 69 Months Ended 75 Months Ended 120 Months Ended
Aug. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Investor Class GPEOX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   8.88%   (1.87%)     4.74%
Investor Class GPEOX | MSCI EM SMID Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [1]   24.86%   7.30%     7.91%
Investor Class GPEOX | MSCI EM IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [1]   31.38%   4.66%     8.37%
Institutional Class GPEIX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   9.08%   (1.64%)     4.99%
Institutional Class GPEIX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   5.18%   (2.94%)     4.23%
Institutional Class GPEIX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   10.66%   (0.73%)     4.27%
Institutional Class GPGCX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   20.03%   11.38%   14.54%  
Performance Inception Date Sep. 17, 2019            
Institutional Class GPGCX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   15.12%   9.34%   12.75%  
Institutional Class GPGCX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   13.60%   8.45%   11.30%  
Institutional Class GPGCX | MSCI ACWI Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [2]   19.72%   7.29%   9.66%  
Institutional Class GPGCX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [2]   22.05%   10.75%   12.44%  
Institutional Class GPGEX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent [3]   10.66% (2.60%)        
Performance Inception Date Dec. 16, 2021            
Institutional Class GPGEX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent [3]   10.63% (2.69%)        
Institutional Class GPGEX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent [3]   6.63% (1.91%)        
Institutional Class GPGEX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [3],[4]   22.05% 9.43%        
Institutional Class GPGEX | MSCI ACWI Mid Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [3],[4]   18.92% 5.72%        
Institutional Class GPGEX | MSCI ACWI Small-Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [3],[4]   19.72% 6.06%        
Institutional Class GPMCX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   13.24%   1.03%     8.98%
Institutional Class GPMCX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   12.34%   0.23%     7.92%
Institutional Class GPMCX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   8.44%   0.88%     7.24%
Institutional Class GPMCX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [5]   22.05%   10.75%     11.45%
Institutional Class GPMCX | MSCI ACWI Small-Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [5]   19.72%   7.29%     9.32%
Institutional Class GPMCX | MSCI World Micro Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [5]   30.79%   5.84%     8.73%
Investor Class GPGOX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   8.57%   (1.72%)     7.23%
Investor Class GPGOX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [6]   22.05%   10.75%     11.45%
Investor Class GPGOX | MSCI ACWI Small-Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [6]   19.72%   7.29%     9.32%
Institutional Class GPGIX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   8.95%   (1.49%)     7.51%
Institutional Class GPGIX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   7.77%   (2.65%)     6.15%
Institutional Class GPGIX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   6.33%   (0.92%)     6.07%
Investor Class GPROX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   8.80%   (0.58%)     7.67%
Investor Class GPROX | MSCI ACWI Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [7]   19.72%   7.29%     9.32%
Investor Class GPROX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [7]   22.05%   10.75%     11.45%
Institutional Class GPRIX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   9.10%   (0.34%)     7.93%
Institutional Class GPRIX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   4.83%   (2.03%)     6.44%
Institutional Class GPRIX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   8.47%   (0.14%)     6.41%
Investor Class GGSOX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   2.60%   (3.50%)     6.46%
Investor Class GGSOX | MSCI ACWI Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [8]   19.72%   7.29%     9.32%
Investor Class GGSOX | MSCI ACWI IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [8]   22.05%   10.75%     11.45%
Investor Class GGSOX | MSCI ACWI Mid Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [8]   18.92%   7.26%     9.08%
Institutional Class GGSYX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   2.89%   (3.26%)     6.73%
Institutional Class GGSYX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   2.95%   (3.73%)     6.22%
Institutional Class GGSYX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   1.83%   (2.31%)     5.50%
Investor Class GPIOX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   11.76%   (3.13%)     5.25%
Investor Class GPIOX | MSCI ACWI ex USA Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [9]   29.26%   6.91%     8.13%
Investor Class GPIOX | MSCI ACWI ex USA IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [9]   31.96%   7.77%     8.37%
Institutional Class GPIIX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   11.93%   (2.89%)     5.48%
Institutional Class GPIIX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   10.76%   (3.81%)     4.36%
Institutional Class GPIIX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   7.56%   (2.06%)     4.33%
Investor Class GISOX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   9.81%   (2.55%)     6.55%
Investor Class GISOX | MSCI ACWI ex USA Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [10]   29.26%   6.91%     8.13%
Investor Class GISOX | MSCI ACWI ex USA IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [10]   31.96%   7.77%     8.37%
Investor Class GISOX | MSCI ACWI ex USA Mid Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [10]   31.92%   6.70%     7.66%
Institutional Class GISYX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   10.12%   (2.30%)     6.82%
Institutional Class GISYX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   10.03%   (2.72%)     6.46%
Institutional Class GISYX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   6.25%   (1.56%)     5.60%
Institutional Class GUSYX              
Prospectus [Line Items]              
Average Annual Return, Label [Optional Text] Return Before Taxes            
Average Annual Return, Percent   1.09%   0.47% 13.65%    
Performance Inception Date Mar. 19, 2020            
Institutional Class GUSYX | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent   1.09%   0.37% 13.51%    
Institutional Class GUSYX | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent   0.64%   0.35% 11.05%    
Institutional Class GUSYX | MSCI USA Mid Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [11]   8.36%   7.75% 17.85%    
Institutional Class GUSYX | MSCI USA Small-Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [11]   11.63%   7.59% 18.89%    
Institutional Class GUSYX | MSCI USA IMI Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent [11]   16.81%   12.82% 20.94%    
Grandeur Peak Global Opportunities Fund | MSCI ACWI Small Cap Index (Net)              
Prospectus [Line Items]              
Average Annual Return, Percent   19.72%   7.29%     9.32%
[1] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[2] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[3] As of September 1, 2025, the Fund invests primarily in equity securities of companies with market capitalization of more than $1.5 billion at the time of purchase. Prior to September 1, 2025, the Fund invested primarily in equity securities of companies with market capitalization of less than $5 billion at the time of purchase.
[4] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[5] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[6] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[7] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[8] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[9] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[10] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.
[11] Net performance reflects the reinvestment of dividends after the deduction of withholding taxes, using a tax rate applicable to non-resident individuals who do not benefit from double taxation treaties.