Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Revenues	$ 750	$ 869
Number of Countries in which Entity Operates	11	11
Gain (Loss), Foreign Currency Transaction, before Tax	$ 3	$ 13
Research and Development Expense	5,591	2,781
Accounts Receivable, Allowance for Credit Loss, Current	$ 0	0
Property, Plant and Equipment, Useful Life (Year)	5 years
Impairment, Long-Lived Asset, Held-for-Use	$ 0	0
Gain (Loss) on Disposition of Assets	(25)	$ (0)
Treasury Stock, Value, Acquired, Cost Method	$ 119
Purchased Software [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years