Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Narrative)

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Commitments and Contingencies (Details Narrative) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2003
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]        
Self-insured retention   $ 100,000    
Restricted cash, noncurrent   12,222,000   $ 12,074,000
Interest income   174,000 $ 127,000  
Letters of credit outstanding, amount   3,950,000    
Bond outstanding   26,747,000    
American International Group, Inc [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Period of finite risk insurance policy 25 years      
Maximum allowable coverage of insurance policy   28,177,000    
Coverage amount under the policy   23,376,000    
Restricted cash, noncurrent   12,222,000   12,074,000
Interest income   $ 148,000 $ 67,000  
Insurers obligation to entity on termination of contract   100.00%    
American International Group, Inc [Member] | Finite Risk Sinking Funds [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest income   $ 2,751,000   2,603,000
Canadian Nuclear Laboratories LTD [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Outstanding receivables   $ 1,612,000   $ 2,389,000