Annual report pursuant to Section 13 and 15(d)

Note 14 - Commitments and Contingencies (Details Textual)

v3.6.0.2
Note 14 - Commitments and Contingencies (Details Textual) - USD ($)
1 Months Ended 12 Months Ended 72 Months Ended
Aug. 31, 2007
Jun. 30, 2003
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Bonds and Letters of Credit Outstanding Amount     $ 1,514,000    
Operating Leases, Rent Expense, Net     1,027,000 $ 976,000  
Non-Cancelable Operating Leases [Member]          
Operating Leases, Rent Expense     735,000 659,000  
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 of Reduction During Period     9,711,000    
Financial Assurance Coverage Amount under Insurance Policy     29,163,000   29,163,000
Sinking Fund Related to Insurance Policy     15,546,000 15,460,000 15,546,000
Interest Earned on Sinking Fund     1,075,000 989,000 $ 1,075,000
Interest Income, Other     $ 86,000 31,000  
Insurers Obligation to Entity on Termination of Contract     100.00%   100.00%
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member]          
Financial Assurance Coverage Amount under Insurance Policy     $ 7,973,000   $ 7,973,000
Interest Income, Other     21,000 15,000  
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     5,941,000 5,920,000 5,941,000
Interest Earned on Sinking Fund under Second Insurance Policy     $ 241,000 $ 220,000 241,000
Period of Finite Second Insurance Policy     4 years    
Release of the Sinking Fund Related to Second the Insurance Policy     $ 5,941,000    
Net Proceeds from the Release of the Sinking Fund Related to the Second Insurance Policy     3,441,000    
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
Debt Instrument, Collateral Amount     $ 2,500,000   2,500,000
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