Note 6 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Amortization of right-of-use assets	$ 7	$ 0
Interest on lease liabilities	1	0
Total finance lease cost	8	0
Operating lease cost	0	13
Short-term lease cost	15	26
Total lease cost	23	39
Operating cash flows from operating leases included in lease liabilities	0	13
Lease liabilities obtained from new ROU assets - operating	0	0
Operating cash flows from financing leases included in lease liabilities	1	0
Financing cash flows from financing leases included in lease liabilities	7	(0)
Lease liabilities obtained from new ROU assets - financing	$ 0	$ 0
Weighted-average remaining lease term - financing leases (years) (Year)	3 years		3 years 3 months
Weighted-average discount rate - financing leases	4.75%		4.75%