| Income Statement | 2025-09-30 |
|---|---|
| Total income (loss)-United States Commodity Index Fund | 16,104,578 |
| Total expenses-United States Commodity Index Fund | 664,341 |
| Realized gain (loss) on closed commodity futures contracts-United States Commodity Index Fund | 8,806,830 |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Commodity Index Fund | 4,599,878 |
| Dividend income-United States Commodity Index Fund | 1,822,837 |
| Interest income-United States Commodity Index Fund | 873,633 |
| Etf transaction fees-United States Commodity Index Fund | 1,400 |
| Realized gain (loss) on closed commodity futures contracts-United States Copper Index Fund | -3,556,887 |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Copper Index Fund | -2,627,899 |
| Dividend income-United States Copper Index Fund | 1,354,017 |
| Interest income-United States Copper Index Fund | 1,043,410 |
| Etf transaction fees-United States Copper Index Fund | 11,550 |
| Realized gain (loss) on closed commodity futures contracts-United States Commodity Index Funds Trust | 5,249,943 |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Commodity Index Funds Trust | 1,971,979 |
| Dividend income-United States Commodity Index Funds Trust | 3,176,854 |
| Interest income-United States Commodity Index Funds Trust | 1,917,043 |
| Etf transaction fees-United States Commodity Index Funds Trust | 12,950 |
| Total income (loss)-United States Copper Index Fund | -3,775,809 |
| Total expenses-United States Copper Index Fund | 526,262 |
| Realized gain (loss) on closed commodity futures contracts | 5,249,943 |
| Change in unrealized gain (loss) on open commodity futures contracts | 1,971,979 |
| Dividend income | 3,176,854 |
| Interest income | 1,917,043 |
| Etf transaction fees | 12,950 |
| Total income (loss)-United States Commodity Index Funds Trust | 12,328,769 |
| Total expenses-United States Commodity Index Funds Trust | 1,190,603 |
| Expense waiver (note 4)-United States Commodity Index Funds Trust | 0 |
| Net income (loss) | -4,302,071 |
United States Commodity Index Funds Trust (CPER)
United States Commodity Index Funds Trust (CPER)