Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.24.0.1
Summary of Significant Accounting Policies (Narrative) (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
customer
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
customer
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Summary Of Significant Accounting Policies [Line Items]          
Accounts receivable - trade         $ 1,000,000
Reserve for loss on contract   $ 0   $ 0  
Revenue recognized   50,000   0  
Contract assets   0   0  
Contract liabilities   $ 0   0 $ 100,000
Lease, Practical Expedients, Package [true false]   false      
Investments in debt securities   $ 0   0  
Inventory   0   0  
Research and development expense $ 2,462,000 $ 0 $ 5,524,000    
Dividend rate   0.00%      
Amount in excess of insured limit   $ 3,200,000   $ 6,900,000  
Revenue reported in discontinued operations 130,000   186,000    
Revenues   $ 50,000      
Discontinued Operations [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Revenue recognized included in contract liabilities $ 36,000   $ 48,000    
One Customer [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration risk, percentage 100.00%   100.00%    
Revenues $ 0   $ 0    
Two Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number of major customers | customer 2        
Three Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number of major customers | customer     3    
Minimum [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Fixed assets, useful life   3 years      
Maximum [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Fixed assets, useful life   10 years      
Intellectual Property [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Intangible asset, useful life   20 years