Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.23.3
Summary of Significant Accounting Policies (Narrative) (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
customer
Sep. 30, 2022
USD ($)
customer
Jun. 30, 2023
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Accounts receivable - trade $ 0   $ 0
Reserve for loss on contract 0   0
Revenue recognized 50,000 $ 0  
Contract assets 0   0
Contract liabilities $ 0   0
Revenue recognized included in contract liabilities   56,000  
Lease, Practical Expedients, Package [true false] false    
Investments in debt securities $ 0   0
Inventory 0   0
Research and development expense $ 0 3,062,000  
Dividend rate 0.00%    
Amount in excess of insured limit $ 4,100,000   $ 6,900,000
Revenue reported in discontinued operations   $ 56,000  
Revenues $ 50,000    
One Customer [Member] | Revenue [Member] | Customer Concentration Risk [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of major customers | customer 1 1  
Revenue reported in discontinued operations $ 0    
Concentration risk, percentage   100.00%  
Revenues   $ 0  
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 39 years    
Intellectual Property [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Intangible asset, useful life 20 years