Annual report pursuant to Section 13 and 15(d)

Note 13 - Commitments and Contingencies (Details Textual)

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Note 13 - Commitments and Contingencies (Details Textual) - USD ($)
 1 Months Ended 12 Months Ended 60 Months Ended
Aug. 31, 2007
Jun. 30, 2003
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member] | Minimum [Member]          
Renewal Fee for Additional Year under Second Insurance Policy         $ 41,000
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member] | Maximum [Member]          
Renewal Fee for Additional Year under Second Insurance Policy         46,000
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member]          
Interest Income, Other     $ 15,000 $ 7,000  
Financial Assurance Coverage Amount under Second Insurance Policy $ 7,800,000        
Annual Growth Rate of Financial Assurance Coverage Amount Under Second Insurance Policy 1.50%        
Maximum Financial Assurance Coverage Amount Under Second Insurance Policy $ 8,200,000        
Sinking Fund Related to Second Insurance Policy     5,920,000 5,905,000 5,920,000
Interest Earned on Sinking Fund under Second Insurance Policy     $ 220,000 205,000 220,000
Period of Finite Second Insurance Policy     4 years    
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     38,454,000   38,454,000
Sinking Fund Related to Insurance Policy     15,460,000 15,429,000 15,460,000
Interest Earned on Sinking Fund     989,000 958,000 $ 989,000
Interest Income, Other     $ 31,000 20,000  
Insurers Obligation to Entity on Termination of Contract     100.00%   100.00%
Non-Cancelable Operating Leases [Member]          
Operating Leases, Rent Expense     $ 659,000 826,000  
Bonds and Letters of Credit Outstanding Amount     1,738,000    
Operating Leases, Rent Expense, Net     $ 976,000 $ 1,158,000