Condensed Statements of Financial Condition - USD ($)		Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents		$ 124,713,160
United States Commodity Index Fund
Assets
Cash and cash equivalents		98,495,028	$ 163,036,680
Equity in trading accounts:
Cash and cash equivalents		3,408,539	27,277,314
Unrealized gain (loss) on open commodity futures contracts		5,481,619	2,138,868
Dividends receivable		2,797	25,510
Prepaid insurance	[1]	10,709	20,198
ETF transaction fees receivable		0	350
Total Assets		107,398,692	192,498,920
Liabilities and Capital
Payable for shares redeemed		0	1,843,700
Management fees payable (Note 4)		72,334	142,699
Professional fees payable		292,861	571,822
Brokerage commissions payable		3,955	33,805
Directors' fees payable	[1]	1,422	11,412
Total Liabilities		370,572	2,603,438
Commitments and Contingencies (Notes 4, 5 & 6)
Capital
Sponsor		0	0
Shareholders		107,028,120	189,895,482
Total Capital		107,028,120	189,895,482
Total Liabilities and Capital		$ 107,398,692	$ 192,498,920
Shares Outstanding		3,600,000	5,150,000
Net asset value per share		$ 29.73	$ 36.87
Market value per share		$ 29.70	$ 36.90
United States Copper Index Fund
Assets
Cash and cash equivalents		$ 26,218,132	$ 6,699,854
Equity in trading accounts:
Cash and cash equivalents		338,182	399,050
Unrealized gain (loss) on open commodity futures contracts		1,610,888	346,250
Receivable from Sponsor (Note 4)		39,770	67,629
Dividends receivable		793	1,363
Interest receivable		0	125
Prepaid insurance	[1]	460	253
Total Assets		28,208,225	7,514,524
Liabilities and Capital
Payable due to Broker		0	429,967
Management fees payable (Note 4)		15,926	4,647
Professional fees payable		40,457	64,311
Directors' fees payable	[1]	360	222
Total Liabilities		56,743	499,147
Commitments and Contingencies (Notes 4, 5 & 6)
Capital
Sponsor		0	0
Shareholders		28,151,482	7,015,377
Total Capital		28,151,482	7,015,377
Total Liabilities and Capital		$ 28,208,225	$ 7,514,524
Shares Outstanding		1,500,000	400,000
Net asset value per share		$ 18.77	$ 17.54
Market value per share		$ 18.70	$ 17.54
USCF Crescent Crypto Index Fund
Assets
Cash and cash equivalents		$ 0	$ 1,000
Equity in trading accounts:
Total Assets		0	1,000
Liabilities and Capital
Commitments and Contingencies (Notes 4, 5 & 6)
Capital
Sponsor		0	1,000
Shareholders		0	0
Total Capital		0	1,000
Total Liabilities and Capital		0	1,000
United States Commodity Index Funds Trust
Assets
Cash and cash equivalents		124,713,160	169,737,534
Equity in trading accounts:
Cash and cash equivalents		3,746,721	27,676,364
Unrealized gain (loss) on open commodity futures contracts		7,092,507	2,485,118
Receivable from Sponsor (Note 4)		39,770	67,629
Dividends receivable		3,590	26,873
Interest receivable		0	125
Prepaid insurance	[1]	11,169	20,451
ETF transaction fees receivable		0	350
Total Assets		135,606,917	200,014,444
Liabilities and Capital
Payable due to Broker		0	429,967
Payable for shares redeemed		0	1,843,700
Management fees payable (Note 4)		88,260	147,346
Professional fees payable		333,318	636,133
Brokerage commissions payable		3,955	33,805
Directors' fees payable	[1]	1,782	11,634
Total Liabilities		427,315	3,102,585
Commitments and Contingencies (Notes 4, 5 & 6)
Capital
Sponsor		0	1,000
Shareholders		135,179,602	196,910,859
Total Capital		135,179,602	196,911,859
Total Liabilities and Capital		$ 135,606,917	$ 200,014,444
Shares Outstanding		5,100,000	5,550,000

[1] Certain prior year amounts have been reclassified for consistency with the current presentation.