Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Narrative)

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Commitments and Contingencies (Details Narrative)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2003
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2022
CAD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Self-insured retention.       $ 100,000      
Accounts receivable, after allowance for credit loss, current   $ 12,956,000   12,956,000     $ 11,372,000
Restricted cash, noncurrent   11,511,000   11,511,000     11,471,000
Interest income   29,000 $ 2,000 40,000   $ 21,000  
Letters of credit outstanding, amount   3,020,000   3,020,000      
Bond outstanding   53,148,000   53,148,000      
American International Group, Inc [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Period of finite risk insurance policy 25 years            
Maximum allowable coverage of insurance policy   28,177,000   28,177,000      
Coverage amount under the policy   21,175,000   21,175,000      
Interest income   $ 29,000 $ 2,000 $ 40,000   $ 21,000  
Insurers obligation to entity on termination of contract   100.00%   100.00%      
American International Group, Inc [Member] | 2003 Closure Policy [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Restricted cash, noncurrent   $ 11,511,000   $ 11,511,000     11,471,000
Interest income       2,040,000     $ 2,000,000
Canadian Nuclear Laboratories LTD [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Unpaid receivables and unbilled costs       2,750,000      
Accounts receivable, after allowance for credit loss, current   $ 1,115,000   $ 1,115,000      
Bond securing amount         $ 1,900,000