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 ($)
 3 Months Ended 9 Months Ended 57 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 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 $ 4,000 $ 1,000 $ 7,000 $ 4,000  
Financial Assurance Coverage Amount under Second Insurance Policy 7,800,000   $ 7,800,000   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   $ 8,200,000   8,200,000
Sinking Fund Related to Second Insurance Policy 5,912,000   5,912,000   5,912,000
Interest Earned on Sinking Fund under Second Insurance Policy 212,000   $ 212,000   212,000
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   39,000,000
Financial Assurance Coverage Amount under Insurance Policy 38,454,000   38,454,000   38,454,000
Sinking Fund Related to Insurance Policy 15,452,000   15,452,000   15,452,000
Interest Earned on Sinking Fund 980,000   980,000   $ 980,000
Interest Income, Other $ 9,000 $ 5,000 $ 23,000 $ 15,000  
Insurers Obligation to Entity on Termination of Contract 100.00%   100.00%   100.00%
Bonds and Letters of Credit Outstanding Amount     $ 1,773,000