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Commitments and Contingencies (Details Narrative) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
May 01, 2017 | Sep. 30, 2003 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Interest income, other |  |  | $ 34,000 | $ 31,000 | $ 105,000 | $ 78,000 |
Letters of credit outstanding, amount |  |  | 2,675,000 |  | 2,675,000 |  |
Bond outstanding |  |  | 8,253,000 |  | 8,253,000 |  |
Amendment to the Revised Loan Agreement [Member] | PNC Bank [Member] |  |  |  |  |  |  |
Line of credit facility reduction, additional reduction |  |  |  |  | 750,000 |  |
Perma-Fix Northwest Richland, Inc [Member] | Standby Letter of Credit for New Bonding Mechanism [Member] |  |  |  |  |  |  |
Debt instrument, collateral amount |  |  | 2,500,000 |  | 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 |  | 39,000,000 |  |
Financial assurance coverage amount under insurance policy |  |  | 29,473,000 |  | 29,473,000 |  |
Sinking fund related to insurance policy |  |  | 15,642,000 |  | 15,642,000 |  | $ 15,546,000
Interest earned on sinking fund |  |  | 1,171,000 |  | 1,171,000 |  | 1,075,000
Interest income, other |  |  | $ 35,000 | 24,000 | $ 96,000 | 62,000 |
Insurers obligation to entity on termination of contract |  |  | 100.00% |  | 100.00% |  |
American International Group, Inc [Member] | Perma-Fix Northwest Richland, Inc [Member] |  |  |  |  |  |  |
Interest income, other |  |  | $ 2,000 | $ 7,000 | $ 10,000 | $ 14,000 |
Interest earned on sinking fund under second insurance policy |  |  |  |  |  |  | 241,000
Release of the sinking fund related to second the insurance policy | $ 5,951,000 |  |  |  |  |  |
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 |  |
American International Group, Inc [Member] | Other Noncurrent Assets [Member] | Perma-Fix Northwest Richland, Inc [Member] |  |  |  |  |  |  |
Sinking fund related to second insurance policy |  |  |  |  |  |  | $ 5,941,000

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