Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Commitments and Contingencies (Details Textual)

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Note 8 - Commitments and Contingencies (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
May 01, 2017
Jun. 30, 2003
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Letters of Credit Outstanding, Amount     $ 2,675,000   $ 2,675,000    
Bond Outstanding     8,253,000   8,253,000    
Amendment to the Revised Loan Agreement [Member] | PNC Bank [Member]              
Line of Credit Facility Reduction, Additional Reduction         750,000    
Perma-Fix Northwest Richland, Inc [Member] | Standby Letter of Credit for New Bonding Mechanism [Member]              
Debt Instrument, Collateral Amount     2,500,000   2,500,000    
American International Group, Inc [Member]              
Period of Finite Risk Insurance Policy   25 years          
Maximum Allowable Coverage of Insurance Policy     39,000,000   39,000,000    
Financial Assurance Coverage Amount under Insurance Policy     29,473,000   29,473,000    
Sinking Fund Related to Insurance Policy     15,608,000   15,608,000   $ 15,546,000
Interest Earned on Sinking Fund     1,136,000   1,136,000   1,075,000
Interest Income, Other     $ 34,000 $ 24,000 $ 61,000 $ 38,000  
Insurers Obligation to Entity on Termination of Contract     100.00%   100.00%    
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member]              
Interest Income, Other     $ 2,000 $ 5,000 $ 10,000 $ 7,000  
Interest Earned on Sinking Fund under Second Insurance Policy             241,000
Release of the Sinking Fund Related to Second the Insurance Policy $ 5,951,000            
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     $ 7,000,000   $ 7,000,000    
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member] | Other Noncurrent Assets [Member]              
Sinking Fund Related to Second Insurance Policy             $ 5,941,000