v3.25.4
Harbor Ares Systematic High-Yield ETF Average Annual Total Returns
 12 Months Ended 20 Months Ended 52 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent   7.30% [1] 6.97% (0.34%) [1]
ICE BofA U.S. High Yield (H0A0) (reflects no deduction for fees, expenses or taxes)[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [2]   8.50%   4.03%
NONE or SAME        
Prospectus [Line Items]        
Average Annual Return, Percent   8.30%   4.95%
Performance Inception Date Sep. 14, 2021      
NONE or SAME | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   4.99%   2.01%
NONE or SAME | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   4.84%   2.45%
[1] This index represents a broad measure of market performance.
[2] The Advisor considers this index to be representative of the Fund’s principal investment strategies and therefore the appropriate benchmark index for the Fund for performance comparison purposes.