Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Cash, Cash Equivalents and Restricted Cash) (Details)

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Summary of Significant Accounting Policies (Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($)
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]      
Additional collateral held by bank (percentage of credit issued) 5.00%    
Cash and equivalents $ 14,210,000 $ 4,301,000  
Restricted cash 215,000 253,000  
Total cash, cash equivalents and restricted cash 14,425,000 7,579,000 $ 28,672,000
Collateral Held For Letter Of Credit - Term Note Payable      
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]      
Restricted cash   3,025,000  
Collateral Held For Letter Of Credit - San Diego Lease      
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]      
Restricted cash 198,000 198,000  
Collateral Held For Company Purchasing Card      
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]      
Restricted cash $ 17,000 $ 55,000