| Label | Element | Value |
|---|---|---|
| F/m US Treasury 30 Year Bond ETF | United States Treasury Note/Bond [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 99.80% |
| F/m US Treasury 30 Year Bond ETF | Government [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 99.80% |
| F/m US Treasury 30 Year Bond ETF | Cash & Other [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 0.20% |