Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details Narrative)

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Commitments and Contingencies (Details Narrative) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Apr. 30, 2017
Jun. 30, 2003
Dec. 31, 2018
Dec. 31, 2017
Interest income, other     $ 295 $ 140
Letters of credit outstanding, amount     2,648  
Bond outstanding     11,284  
Operating leases, rent expense     766 754
American International Group, Inc [Member]        
Period of finite risk insurance policy   25 years    
Maximum allowable coverage of insurance policy     39,000  
Financial assurance coverage amount under insurance policy     29,977  
Sinking fund related to insurance policy     15,971 15,676
Interest earned on sinking fund     1,500 1,205
Interest income, other     $ 295 $ 130
Insurers obligation to entity on termination of contract     100.00%  
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member]        
Release of the sinking fund related to second the insurance policy $ 5,951      
Debt instrument, collateral amount     $ 2,500  
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member] | Credit Facility Secured by a Bond [Member]        
Financial assurance coverage amount under a bond     $ 7,000