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The Company and its Significant Accounting Policies, Leases (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Current Assets [Abstract]    
Investment in sales-type sublease - current $ 0 $ 532,000
Long-term Assets [Abstract]    
Operating lease right-of-use asset 59,000 94,000
Total leased assets 59,000 626,000
Current Liabilities [Abstract]    
Obligations under finance lease - current portion 0 89,000
Operating lease right-of-use liability - current portion 43,000 40,000
Long-term Liabilities [Abstract]    
Operating lease right-of-use liability - net of current portion 23,000 66,000
Total lease liabilities 66,000 195,000
Lease Cost [Abstract]    
Net lease cost 34,000  
Net lease income   (7,000)
Operating lease [Abstract]    
2022 46,000  
2023 24,000  
Total 70,000  
Less amount representing interest 4,000  
Present value of lease liabilities $ 66,000 106,000
Discount rate 5.85%  
Selling, General and Administrative Expenses [Member]    
Lease Cost [Abstract]    
Operating lease cost $ 41,000 42,000
Interest Expense [Member]    
Lease Cost [Abstract]    
Finance lease cost, interest on lease liabilities 1,000 23,000
Interest Income - Sales-type Sublease [Member]    
Lease Cost [Abstract]    
Sublease income $ 8,000 $ 72,000