v3.25.2
Average Annual Total Returns
 12 Months Ended 37 Months Ended 57 Months Ended 60 Months Ended 63 Months Ended 110 Months Ended 112 Months Ended 120 Months Ended
Aug. 28, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Investor Class GPEOX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (8.93%)     1.78%       3.29%
Investor Class GPEOX | MSCI EM SMID Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [1]   3.18%     5.42%       4.42%
Investor Class GPEOX | MSCI EM IMI Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [1]   7.09%     2.51%       3.90%
Institutional Class GPEIX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (8.62%)     2.03%       3.53%
Institutional Class GPEIX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (8.24%)     1.41%       3.07%
Institutional Class GPEIX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (3.93%)     1.92%       2.93%
Institutional Class GPGCX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   14.93%     12.28% 13.53%      
Performance Inception Date Sep. 17, 2019                
Institutional Class GPGCX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   12.56%     11.02% 12.31%      
Institutional Class GPGCX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   9.62%     9.45% 10.53%      
Institutional Class GPGCX | MSCI ACWI Small Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [2]   7.66%     6.68% 7.86%      
Institutional Class GPGCX | MSCI ACWI IMI Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [2]   16.37%     9.67% 10.70%      
Institutional Class GPGEX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (0.85%) (6.61%)            
Performance Inception Date Dec. 16, 2021                
Institutional Class GPGEX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (0.98%) (6.71%)            
Institutional Class GPGEX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (0.17%) (4.91%)            
Institutional Class GPGEX | MSCI ACWI IMI Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [3]   16.37% 5.56%            
Institutional Class GPGEX | MSCI ACWI Small-Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [3]   7.66% 1.92%            
Institutional Class GPGEX | MSCI ACWI Mid Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [3]   9.49% 1.71%            
Institutional Class GPMCX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   3.22%     7.28%   8.40%    
Performance Inception Date Oct. 21, 2015                
Institutional Class GPMCX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   3.41%     6.17%   7.34%    
Institutional Class GPMCX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   2.32%     5.90%   6.78%    
Institutional Class GPMCX | MSCI ACWI IMI Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [4]   16.37%     9.67%   9.93%    
Institutional Class GPMCX | MSCI ACWI Small-Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [4]   7.66%     6.68%   7.87%    
Institutional Class GPMCX | MSCI World Micro Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [4]   5.71%     4.50%   6.30%    
Investor Class GPGOX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (10.11%)     4.06%       6.51%
Investor Class GPGOX | MSCI ACWI IMI Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [5]   16.37%     9.67%       9.00%
Investor Class GPGOX | MSCI ACWI Small-Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [5]   7.66%     6.68%       7.26%
Institutional Class GPGIX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (10.05%)     4.33%       6.76%
Institutional Class GPGIX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (10.34%)     2.97%       5.33%
Institutional Class GPGIX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (5.57%)     3.69%       5.43%
Investor Class GPROX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   0.91%     4.72%       6.70%
Investor Class GPROX | MSCI ACWI Small Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [6]   7.66%     6.68%       7.26%
Investor Class GPROX | M S C I A C W I I M I Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [6]   16.37%     9.67%       9.00%
Institutional Class GPRIX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (0.65%)     4.98%       6.97%
Institutional Class GPRIX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (1.85%)     3.65%       5.81%
Institutional Class GPRIX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   0.81%     4.11%       5.61%
Investor Class GGSOX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (4.60%)     2.78%     7.26%  
Performance Inception Date Sep. 01, 2015                
Investor Class GGSOX | MSCI ACWI Small Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent [7]   7.66%     6.68%     8.21%  
Investor Class GGSOX | M S C I A C W I I M I Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [7]   16.37%     9.67%     10.38%  
Investor Class GGSOX | M S C I A C W I Mid Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [7]   9.49%     6.58%     8.05%  
Institutional Class GGSYX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (4.36%)     3.05%     7.53%  
Performance Inception Date Sep. 01, 2015                
Institutional Class GGSYX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (4.36%)     2.39%     6.97%  
Institutional Class GGSYX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (2.58%)     2.53%     6.16%  
Investor Class GPIOX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (11.64%)     0.87%       4.35%
Investor Class GPIOX | M S C I A C W Iex U S A Small Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [8]   3.36%     4.30%       5.66%
Investor Class GPIOX | M S C I A C W Iex U S A I M I Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [8]   5.23%     4.12%       4.91%
Institutional Class GPIIX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (11.48%)     1.12%       4.58%
Institutional Class GPIIX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (12.02%)     0.22%       3.46%
Institutional Class GPIIX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (6.42%)     1.13%       3.66%
Investor Class GISOX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (10.00%)     2.03%     6.83%  
Investor Class GISOX | M S C I A C W Iex U S A Small Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [9]   3.36%     4.30%     6.26%  
Investor Class GISOX | M S C I A C W Iex U S A I M I Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [9]   5.23%     4.12%     5.95%  
Investor Class GISOX | M S C I A C W Iex U S A Mid Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [9]   3.58%     2.95%     5.33%  
Institutional Class GISYX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   (9.79%)     2.28%     7.09%  
Institutional Class GISYX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (9.76%)     1.85%     6.70%  
Institutional Class GISYX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   (5.48%)     1.98%     5.83%  
Institutional Class GUSYX                  
Prospectus [Line Items]                  
Average Annual Return, Label [Optional Text] Return Before Taxes                
Average Annual Return, Percent   5.63%   16.46%          
Performance Inception Date Mar. 19, 2020                
Institutional Class GUSYX | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   5.63%   16.30%          
Institutional Class GUSYX | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   3.33%   13.28%          
Institutional Class GUSYX | M S C I U S A Mid Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [10]   14.75%   19.93%          
Institutional Class GUSYX | M S C I U S A Small Cap Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [10]   11.57%   20.47%          
Institutional Class GUSYX | M S C I U S A I M I Index [Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent [10]   23.32%   21.82%          
Grandeur Peak Global Opportunities Fund | MSCI ACWI Small Cap Index (Net)                  
Prospectus [Line Items]                  
Average Annual Return, Percent   7.66%     6.68%       7.26%
Grandeur Peak International Stalwarts Fund | Investor Class GISOX                  
Prospectus [Line Items]                  
Performance Inception Date Sep. 01, 2015                
Grandeur Peak International Stalwarts Fund | Institutional Class GISYX                  
Prospectus [Line Items]                  
Performance Inception Date Sep. 01, 2015                
[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] 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.
[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.