Label	Element	Value
F/m Ultrashort Tax-Free Municipal ETF \| New York State Dormitory Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	5.90%
F/m Ultrashort Tax-Free Municipal ETF \| State of California [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.90%
F/m Ultrashort Tax-Free Municipal ETF \| California Health Facilities Financing Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.40%
F/m Ultrashort Tax-Free Municipal ETF \| Indiana Finance Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.00%
F/m Ultrashort Tax-Free Municipal ETF \| South Dakota Health & Educational Facilities Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.90%
F/m Ultrashort Tax-Free Municipal ETF \| Commonwealth of Pennsylvania [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.80%
F/m Ultrashort Tax-Free Municipal ETF \| Wisconsin Health & Educational Facilities Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.70%
F/m Ultrashort Tax-Free Municipal ETF \| Illinois Finance Authority [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.20%
F/m Ultrashort Tax-Free Municipal ETF \| University of Kentucky [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.10%
F/m Ultrashort Tax-Free Municipal ETF \| Lincoln County Consolidated School District No 207 Davenport [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	2.10%
F/m Ultrashort Tax-Free Municipal ETF \| US Municipal [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	98.60%
F/m Ultrashort Tax-Free Municipal ETF \| Cash & Other [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	1.40%