Quarterly report pursuant to Section 13 or 15(d)

Convertible Promissory Note Receivable (Narrative) (Details)

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Convertible Promissory Note Receivable (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Oct. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Interest income   $ 35,000 $ 27,000 $ 71,000 $ 31,000  
Convertible Promissory Note Receivable [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Amount invested $ 1,500,000          
Interest rate 5.00%          
Interest income   19,000   38,000    
Note balance and accrued interest   $ 1,594,000   $ 1,594,000   $ 1,556,000