Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Commitments and Contingencies (Details Textual)

Note 9 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended	3 Months Ended
	Aug. 31, 2007	Jun. 30, 2003	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Bonds and Letters of Credit Outstanding Amount			$ 8,435,000
Bonds Purchased			7,000,000
Perma-Fix Northwest Richland, Inc [Member] \| Standby Letter of Credit for New Bonding Mechanism [Member]
Debt Instrument, Collateral Amount			2,500,000
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			29,473,000
Sinking Fund Related to Insurance Policy			15,573,000		$ 15,546,000
Interest Earned on Sinking Fund			1,102,000		1,075,000
Interest Income, Other			$ 27,000	$ 14,000
Insurers Obligation to Entity on Termination of Contract			100.00%
American International Group, Inc [Member] \| Perma-Fix Northwest Richland, Inc [Member]
Financial Assurance Coverage Amount under Insurance Policy			$ 7,973,000
Interest Income, Other			8,000	$ 2,000
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			$ 249,000		241,000
Period of Finite Second Insurance Policy			4 years
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
American International Group, Inc [Member] \| Perma-Fix Northwest Richland, Inc [Member] \| Other Current Assets [Member]
Sinking Fund Related to Second Insurance Policy			5,949,000
American International Group, Inc [Member] \| Perma-Fix Northwest Richland, Inc [Member] \| Other Noncurrent Assets [Member]
Sinking Fund Related to Second Insurance Policy			$ 5,949,000		$ 5,941,000