Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Summary Of Significant Accounting Policies [Line Items]      
Accounts receivable     $ 1,000,000
Allowance for credit losses $ 0 $ 0  
Revenues 225,000 0  
Contract assets 0 0  
Contract liabilities 200,000 0 $ 100,000
Inventory 0 0  
Research and development expenses $ 5,185,000 $ 10,327,000  
Dividend rate 0.00% 0.00%  
Liability for uncertain tax positions $ 0 $ 0  
Cash deposits held in excess of FDIC insured amount 664,000 6,900,000  
Continuing Operations      
Summary Of Significant Accounting Policies [Line Items]      
Revenues 225,000 0  
Discontinued Operations      
Summary Of Significant Accounting Policies [Line Items]      
Revenues $ 0 391,000  
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Fixed assets, useful life 3 years    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Fixed assets, useful life 39 years    
Intellectual Property      
Summary Of Significant Accounting Policies [Line Items]      
Intangible asset, useful life 20 years    
Revenues      
Summary Of Significant Accounting Policies [Line Items]      
Revenue recognized included in contract liabilities $ 0    
Discontinued Operations      
Summary Of Significant Accounting Policies [Line Items]      
Revenue recognized included in contract liabilities   $ 100,000  
Research and development expenses $ 0