Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 21, 2022	Mar. 31, 2021	Sep. 30, 2020
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	$ (2,100)	$ (2,403)	$ (6,309)		$ (6,136)
Effective Income Tax Rate Reconciliation, Percent, Total		0.00%			0.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%			21.00%
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax						$ 429
Unrecognized Tax Benefits, Ending Balance	$ 300		$ 300