Condensed Statements of Financial Condition (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 169,737,534	$ 438,410,816
Short-Term Investments	0	295,216
Cash and cash equivalents	27,676,364	52,214,641
Sponsor Capital Account	1,000	0
United States Commodity Index Fund
Cash and cash equivalents	163,036,680	427,657,030
Cash and cash equivalents	27,277,314	50,852,183
Sponsor Capital Account	0	0
United States Copper Index Fund
Cash and cash equivalents	6,699,854	10,753,786
Short-Term Investments	0	295,216
Cash and cash equivalents	399,050	1,362,458
Sponsor Capital Account	0	0
USCF Crescent Crypto Index Fund
Cash and cash equivalents	1,000
Sponsor Capital Account	1,000
United States Commodity Index Funds Trust
Cash and cash equivalents	169,737,534	438,410,816
Short-Term Investments	0	295,216
Cash and cash equivalents	$ 27,676,364	$ 52,214,641