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Schedule of Changes in Stockholders' Equity (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     $ 2,933,000 $ 8,503,000
Shares issued for warrant exercise       5,000
Equity-based compensation     118,000 93,000
Issuance of stock and options for services     83,000 98,000
Net loss $ (742,000) $ (716,000) (1,647,000) (1,589,000)
Balance 1,463,000 7,110,000 1,463,000 7,110,000
Cash settlement of equity-based compensation     (24,000)  
Common Stock [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance    
Balance, shares     12,934,741 12,905,112
Shares issued for warrant exercise      
Shares issued for warrant exercise, shares       986
Equity-based compensation    
Equity-based compensation, shares     35,659
Issuance of stock and options for services    
Issuance of stock and options for services, shares     32,203 13,801
Net loss    
Balance
Balance, shares 13,002,603 12,919,899 13,002,603 12,919,899
Cash settlement of equity-based compensation      
Additional Paid-in Capital [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     60,905,000 $ 60,341,000
Shares issued for warrant exercise       5,000
Equity-based compensation     118,000 93,000
Issuance of stock and options for services     83,000 98,000
Net loss    
Balance $ 61,082,000 $ 60,537,000 61,082,000 60,537,000
Cash settlement of equity-based compensation     (24,000)  
Retained Earnings [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (57,972,000) (51,838,000)
Shares issued for warrant exercise      
Equity-based compensation    
Issuance of stock and options for services    
Net loss     (1,647,000) (1,589,000)
Balance $ (59,619,000) $ (53,427,000) (59,619,000) $ (53,427,000)
Cash settlement of equity-based compensation