Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Commitments and Contingencies (Details Textual)

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Note 7 - Commitments and Contingencies (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 60 Months Ended
Aug. 31, 2007
Jun. 30, 2003
Mar. 31, 2016
Mar. 31, 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     $ 5,922,000    
American International Group, Inc [Member] | Other Noncurrent Assets [Member]          
Sinking Fund Related to Insurance Policy     15,474,000    
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     2,000 $ 1,000  
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     $ 222,000    
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    
Financial Assurance Coverage Amount under Insurance Policy     38,874,000    
Interest Earned on Sinking Fund     1,003,000    
Interest Income, Other     14,000 $ 6,000  
Insurers Obligation to Entity on Termination of Contract         100.00%
Bonds and Letters of Credit Outstanding Amount     $ 1,539,000