Note 2 - Summary of Significant Accounting Policies - Concentration Risk (Details) - USD ($)	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Revenue, related parties	$ 5,657,027	$ 7,036,301
Fund management - related party	5,657,027	7,036,301
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member]
Revenue, related parties	$ 1,761,830	$ 2,038,054
Concentration risk percentage	100.00%	100.00%
Fund management - related party	$ 1,761,830	$ 2,038,054
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member] | Customers Related to the USO Fund [Member]
Revenue, related parties	$ 967,323	$ 1,156,691
Concentration risk percentage	55.00%	57.00%
Fund management - related party	$ 967,323	$ 1,156,691
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member] | Customers Related to the BNO Fund [Member]
Revenue, related parties	$ 155,325	$ 196,713
Concentration risk percentage	9.00%	10.00%
Fund management - related party	$ 155,325	$ 196,713
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member] | Customers Related to the UNG Fund [Member]
Revenue, related parties	$ 146,829	$ 130,543
Concentration risk percentage	8.00%	6.00%
Fund management - related party	$ 146,829	$ 130,543
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member] | Customers Related to the USCI Fund [Member]
Revenue, related parties	$ 152,976	$ 141,346
Concentration risk percentage	9.00%	7.00%
Fund management - related party	$ 152,976	$ 141,346
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Wainwright [Member] | All Other Customers [Member]
Revenue, related parties	$ 339,377	$ 412,761
Concentration risk percentage	19.00%	20.00%
Fund management - related party	$ 339,377	$ 412,761
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member]
Revenue, related parties	$ 5,657,027	$ 7,036,301
Concentration risk percentage	100.00%	100.00%
Fund management - related party	$ 5,657,027	$ 7,036,301
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member] | Customers Related to the USO Fund [Member]
Revenue, related parties	$ 3,142,607	$ 4,893,532
Concentration risk percentage	56.00%	69.00%
Fund management - related party	$ 3,142,607	$ 4,893,532
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member] | Customers Related to the BNO Fund [Member]
Revenue, related parties	$ 519,919	$ 758,726
Concentration risk percentage	9.00%	11.00%
Fund management - related party	$ 519,919	$ 758,726
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member] | Customers Related to the UNG Fund [Member]
Revenue, related parties	$ 427,786	$ 551,554
Concentration risk percentage	8.00%	8.00%
Fund management - related party	$ 427,786	$ 551,554
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member] | Customers Related to the USCI Fund [Member]
Revenue, related parties	$ 475,584	$ 250,264
Concentration risk percentage	8.00%	4.00%
Fund management - related party	$ 475,584	$ 250,264
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Wainwright [Member] | All Other Customers [Member]
Revenue, related parties	$ 1,091,131	$ 582,225
Concentration risk percentage	19.00%	8.00%
Fund management - related party	$ 1,091,131	$ 582,225