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Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Summary of Significant Accounting Policies [Line Items]                  
Restricted cash $ 3,930,000           $ 3,930,000   $ 0
Customer deposits 442,000           442,000   1,115,000
Recognized revenue 0     $ 544,000     673,000 $ 1,840,000  
Backlog relating to remaining performance obligations 131,800,000           131,800,000    
Backlog amount 128,500,000           128,500,000    
Contract cost receivable collected                 296,000
Contract costs receivable             $ 296,000
Stock-based compensation expense for employees 152,000 $ 157,000 $ 435,000 150,000 $ 12,000 $ 24,000 744,000 186,000  
Stock-based compensation for directors $ 14,000 $ 39,000 $ 39,000 $ 40,000 $ 38,000 $ 38,000 $ 92,000 $ 116,000