Label	Element	Value
Horizon Kinetics SPAC Active ETF \| Oaktree Acquisition Corp. III Life Sciences [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	5.30%
Horizon Kinetics SPAC Active ETF \| NewHold Investment Corp. IV [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.60%
Horizon Kinetics SPAC Active ETF \| Evolution Global Acquisition Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.20%
Horizon Kinetics SPAC Active ETF \| Wen Acquisition Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.20%
Horizon Kinetics SPAC Active ETF \| Metals Acquisition Corp. II [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.20%
Horizon Kinetics SPAC Active ETF \| Space Asset Acquisition Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.20%
Horizon Kinetics SPAC Active ETF \| Willow Lane Acquisition Corp. II [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.10%
Horizon Kinetics SPAC Active ETF \| OTG Acquisition Corp. I [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.10%
Horizon Kinetics SPAC Active ETF \| Kensington Capital Acquisition Corp. VI [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.10%
Horizon Kinetics SPAC Active ETF \| Cantor Equity Partners V, Inc. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.10%
Horizon Kinetics SPAC Active ETF \| Diversified [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	98.20%
Horizon Kinetics SPAC Active ETF \| Cash & Other [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	1.80%