Note 15 - Commitments and Contingencies (Details Textual)	6 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 NZD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)
Expense Waivers				$ 288,119	$ 325,821
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 61,000	$ 0
USCF [Member]
Defined Contribution Plan, Minimum Age Requirement for Participation	21 years
Defined Contribution Plan, Minimum Years of Service Requirement	1 year
General Security Lease Agreement [Member]
Operating Lease Arrangement, Collateral Amount			$ 110,000	74,072
Lease Arrangement for Primary Facility [Member]
Operating Lease Arrangement, Collateral Amount			$ 20,000	$ 13,468