| Label | Element | Value |
|---|---|---|
| Roundhill Ultra Short Duration No Dividend Target ETF | Purchased Options [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 99.90% |
| Roundhill Ultra Short Duration No Dividend Target ETF | Money Market Funds [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 0.10% |
| Roundhill Ultra Short Duration No Dividend Target ETF | State Street SPDR S&P 500 ETF Trust [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 99.90% |
| Roundhill Ultra Short Duration No Dividend Target ETF | First American Government Obligations Fund [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 0.10% |