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Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Summary of Significant Accounting Policies [Line Items]          
Customer deposits $ 2,261,000   $ 2,261,000   $ 3,557,000
Customer deposits revenue     1,296,000    
Backlog relating to remaining performance obligations in contracts 100,700,000   100,700,000    
Contract costs receivable 296,000   296,000   $ 296,000
Employees [Member]          
Summary of Significant Accounting Policies [Line Items]          
Stock-based compensation expense     36,000 $ 232,000  
Customer Deposits [Member]          
Summary of Significant Accounting Policies [Line Items]          
Customer deposits revenue 897,000 $ 42,000   314,000  
Employees [Member]          
Summary of Significant Accounting Policies [Line Items]          
Stock-based compensation expense 12,000 187,000      
Directors [Member]          
Summary of Significant Accounting Policies [Line Items]          
Stock-based compensation expense $ 38,000 $ 54,000 $ 76,000 $ 108,000