Note 4 - Leases - Schedule of Balance Sheet Presentation of Operating and Finance Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Assets:
Operating lease assets	$ 262	$ 162
Total lease assets	746	628
Liabilities:
Operating lease obligations	130
Financing lease obligations	161	213
Total lease liabilities	607	537
Property and Equipment, Net [Member]
Assets:
Financing lease assets	484	466
Lease Liabilities, Current [Member]
Liabilities:
Operating lease obligations	148	95
Financing lease obligations	168	139
Lease Liabilities, Noncurrent [Member]
Liabilities:
Operating lease obligations	148
Financing lease obligations	168
Operating lease obligations	$ 130	$ 90