v3.26.1
BetaBuilders U.S. Treasury Bond 1-3 Year ETF Investment Objectives and Goals - BetaBuilders U.S. Treasury Bond 1-3 Year ETF
Feb. 28, 2026
Prospectus [Line Items]  
Risk/Return [Heading] <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Ticker: BBSB</span>
Objective [Heading] <span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">What is the goal of the Fund?</span>
Objective, Primary [Text Block] The Fund seeks investment results that closely correspond, before fees and expenses, to the performance of the ICE U.S. Treasury 1-3 Year Bond Index.