Note 3 - Leases - Schedule of Balance Sheet Presentation of Operating and Finance Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022	[1]
Assets:
Operating lease assets	$ 336	$ 162
Total lease assets	751
Liabilities:
Financing lease obligations	140
Total lease liabilities	647
Property and Equipment, Net [Member]
Assets:
Financing lease assets	415
Lease Liabilities, Current [Member]
Liabilities:
Operating lease obligations	148
Financing lease obligations	143
Lease Liabilities, Noncurrent [Member]
Liabilities:
Operating lease obligations	216
Financing lease obligations	$ 140

[1] The balance sheet at June 30, 2022, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by the United States generally accepted accounting principles for complete financial statements.