Note 7 - Other Assets (Details Textual)	9 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)		Mar. 31, 2022 NZD ($)
Other Assets, Current	$ 948,369	$ 399,524	[1]
Marketable Securities, Total	2,900,000	1,800,000
Restricted Cash and Cash Equivalents, Total	13,913	13,989		$ 20,000
Other Assets, Noncurrent	540,160	540,160	[1]
Equity Securities without Readily Determinable Fair Value, Amount	$ 500,000	500,000
Equity Securities without Readily Determinable Fair Value, Ownership Percentage	10.00%			10.00%
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount	$ 0	0
Deposit Assets, Total		40,160
USCF Gold Strategy Plus Income Fund [Member]
Equity Method Investments	$ 1,400,000	$ 0
Equity Method Investment, Ownership Percentage	40.00%	0.00%		40.00%

[1] Derived from audited financial statements