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 60 Months Ended
Aug. 31, 2007
Jun. 30, 2003
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
American International Group, Inc [Member] | Other Noncurrent Assets [Member] | Perma-Fix Northwest Richland, Inc [Member]              
Sinking Fund Related to Second Insurance Policy     $ 5,927,000   $ 5,927,000    
American International Group, Inc [Member] | Other Noncurrent Assets [Member]              
Sinking Fund Related to Insurance Policy     15,498,000   15,498,000    
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     5,000 $ 2,000 7,000 $ 3,000  
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            
Interest Earned on Sinking Fund under Second Insurance Policy     227,000   $ 227,000    
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     38,874,000   38,874,000    
Interest Earned on Sinking Fund     1,027,000   1,027,000    
Interest Income, Other     $ 24,000 $ 6,000 38,000 $ 14,000  
Insurers Obligation to Entity on Termination of Contract             100.00%
Bonds and Letters of Credit Outstanding Amount         $ 1,514,000