v3.26.3
Note 10 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ (14,423) $ (13,848) $ (11,700)
Effective Income Tax Rate Reconciliation, Percent (0.03%) (0.01%) (0.01%)
Unrecognized Tax Benefits $ 848 $ 762 $ 604
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%  
Current State and Local Tax Expense (Benefit) $ 3 $ 2  
Operating Loss Carryforwards, Valuation Allowance 29,400    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 3,000    
Deferred Tax Liabilities, Intangible Assets 1    
Operating Loss Carryforwards 113,500    
Federal Operating Loss Carryforwards Available 36,500    
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward One $ 7,700    
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 7,500    
Unrecognized Tax Benefits Resulting in Net State Operating Loss Carryforwards 400    
Unrecognized Tax Effect on Texas Business Loss Carryforwards 400    
Tax Credit Carryforward, Yearly State Tax Liability 13    
Interest Expense For Uncertain Tax Positions $ 0 $ 0  
Tax Jurisdiction of Domicile [Extensible Enumeration] Income Tax Jurisdiction, Domestic Federal [Member]    
Income Tax Jurisdiction, Domestic Federal [Member]      
Tax Credit Carryforward, Amount $ 1,900    
Income Tax Jurisdiction, Domestic State and Local [Member] | California Franchise Tax Board [Member]      
Tax Credit Carryforward, Amount 60    
Indefinite Lives [Member]      
Federal Operating Loss Carryforwards Available 77,000    
Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward One $ 16,200