Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Taxes Receivable, Current	$ 1	$ 0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ (9,642)	$ (8,330)
Effective Income Tax Rate Reconciliation, Percent, Total	0.00%	0.00%
Current State and Local Tax Expense (Benefit)	$ 0
Unrecognized Tax Benefits	$ 486	$ 400	$ 329
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Operating Loss Carryforwards, Valuation Allowance	$ 21,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	1,700
Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss	305	$ 0
Operating Loss Carryforwards	83,500
Federal Operating Loss Carryforwards Available	37,800
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward One	$ 7,900
Tax Cuts and Jobs Act of 2017, Limits on Utilization of Net Operating Loss to Taxable Income Percentage	80.00%
Tax Credit Carryforward, Amount	$ 500
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	7,400
Unrecognized Tax Benefits Resulting in Net State Operating Loss Carryforwards	400
Unrecognized Tax Effect on Texas Business Loss Carryforwards	400
Deferred Tax Liabilities, Net, Total	13
Interest Expense For Uncertain Tax Positions	0	$ 0
Domestic Tax Authority [Member]
Tax Credit Carryforward, Amount	1,100
Indefinite Lives [Member]
Federal Operating Loss Carryforwards Available	45,700
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward One	$ 9,600