v3.25.4
S000035891 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 119 Months Ended 120 Months Ended 167 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Investor Class Shares          
Prospectus [Line Items]          
Average Annual Return, Percent 4.35% (1.09%)   3.00%  
Performance Inception Date         Jan. 31, 2012
Investor Class Shares | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent 4.65% (1.01%)   3.04%  
Performance Inception Date         Jan. 31, 2012
Investor Class Shares | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent 2.88% (0.68%)   2.43%  
Performance Inception Date         Jan. 31, 2012
Investor Class Shares | MSCI Frontier Emerging Markets Index (reflects no deductions for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [1] 42.94% 7.71%   6.23%  
Investor Class Shares | MSCI Frontier Markets Index (reflects no deductions for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [1] 46.86% 9.61%   7.92%  
Institutional Class Shares          
Prospectus [Line Items]          
Average Annual Return, Percent 4.55% (0.80%) 3.84%    
Performance Inception Date     Feb. 01, 2016    
Institutional Class Shares | MSCI Frontier Emerging Markets Index (reflects no deductions for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [1] 42.94% 7.71% 6.87%    
Institutional Class Shares | MSCI Frontier Markets Index (reflects no deductions for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent [1] 46.86% 9.61% 8.62%    
[1] Source: MSCI. MSCI makes no express or implied warranties or representations and shall have no liability whatsoever with respect to any MSCI data contained herein. The MSCI data may not be further redistributed or used to create indexes or financial products. This report is not approved or produced by MSCI.