Note 3 - Leases - Schedule of Balance Sheet Presentation of Operating and Finance Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Assets:
Operating lease assets	$ 140	$ 162
Total lease assets	580
Liabilities:
Financing lease obligations	177
Total lease liabilities	480
Property and Equipment, Net [Member]
Assets:
Financing lease assets	440
Lease Liabilities, Current [Member]
Liabilities:
Operating lease obligations	98
Financing lease obligations	141
Lease Liabilities, Noncurrent [Member]
Liabilities:
Operating lease obligations	64
Financing lease obligations	$ 177