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 12 Months Ended
Jun. 30, 2003
Mar. 31, 2023
USD ($)
Mar. 31, 2023
CAD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Self-insured retention   $ 100,000      
Accounts receivable, after allowance for credit loss, current   10,881,000     $ 9,364,000
Restricted cash, noncurrent   11,637,000     11,570,000
Interest income   127,000   $ 11,000  
Letters of credit outstanding, amount   3,016,000      
Bond outstanding   27,321,000      
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      
Coverage amount under the policy   22,454,000      
Interest income   $ 67,000   $ 11,000  
Insurers obligation to entity on termination of contract   100.00%      
American International Group, Inc [Member] | 2003 Closure Policy [Member]          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Restricted cash, noncurrent   $ 11,637,000     11,570,000
Interest income   2,166,000     $ 2,099,000
Canadian Nuclear Laboratories LTD [Member]          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Unpaid receivables   1,855,000      
Accounts receivable, after allowance for credit loss, current   $ 1,061,000      
Bond securing amount     $ 1,900,000