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QUARTERLY OPERATING RESULTS (UNAUDITED) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Unaudited quarterly operating results are summarized as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 26,684,000 | $ 29,190,000 | $ 33,698,000 | $ 37,936,000 | $ 32,782,000 | $ 32,787,000 | $ 28,913,000 | $ 23,615,000 | $ 127,509,000 |  | $ 118,097,000 | [1] | $ 97,790,000 |
Gross profit | 3,279,000 | 4,226,000 | 3,930,000 | 4,369,000 | 6,040,000 | 11,301,000 | 8,049,000 | 3,030,000 | 15,804,000 |  | 28,420,000 | [1] | 20,615,000 |
(Loss) income from continuing operations | (861,000) | (472,000) | (1,009,000) | (807,000) | (41,000) | 4,421,000 | 2,552,000 | (533,000) | (3,149,000) |  | 6,399,000 | [1] | 4,882,000 |
(Loss) income from discontinued operations, net of taxes | 229,000 | (61,000) | (60,000) | (138,000) | 189,000 | (187,000) | (32,000) | 212,000 | (30,000) |  | 1,691,000 |  | (919,000) |
Net (loss) income | (632,000) | (533,000) | (1,069,000) | (945,000) | (120,000) | 6,011,000 | 2,520,000 | (321,000) | (3,179,000) |  | 8,090,000 | [1] | 3,963,000 |
Gain (loss) on disposal of discontinued operations, net of taxes |  |  |  |  | (268,000) | 1,777,000 | 0 | 0 | 0 | [2] | 1,509,000 | [2] | 0 | [2]
Net income attributable to noncontrolling interest | 1,000 | 21,000 | 102,000 | 56,000 | 22,000 | 0 | 0 | 0 | 180,000 |  | 22,000 |  | 0 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | (633,000) | (554,000) | (1,171,000) | (1,001,000) | (142,000) | 6,011,000 | 2,520,000 | (321,000) | (3,359,000) |  | 8,068,000 | [1] | 3,963,000 |
Basic net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.08) | $ (0.04) | $ (0.10) | $ (0.08) | $ 0 | $ 0.40 | $ 0.23 | $ (0.05) | $ (0.3) |  | $ 0.58 |  | $ 0.44 |
Discontinued operations (in dollars per share) | $ 0.02 | $ (0.01) | $ 0 | $ (0.01) | $ 0.01 | $ (0.02) | $ 0 | $ 0.02 | $ 0 |  | $ 0.01 |  | $ (0.08) |
Gain on disposal of discontinued operations, net of taxes (in dollars per share) |  |  |  |  | $ (0.02) | $ 0.16 | $ 0 | $ 0 | $ 0 |  | $ 0.14 |  | $ 0 |
Net (loss) income per common share (in dollars per share) | $ (0.06) | $ (0.05) | $ (0.10) | $ (0.09) | $ (0.01) | $ 0.54 | $ 0.23 | $ (0.03) | $ (0.3) |  | $ 0.73 | [1] | $ 0.36 |
Diluted net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.08) | $ (0.04) | $ (0.10) | $ (0.08) | $ 0 | $ 0.40 | $ 0.23 | $ (0.05) | $ (0.30) |  | $ 0.58 |  | $ 0.44 |
Discontinued operations (in dollars per share) | $ 0.02 | $ (0.01) | $ 0 | $ (0.01) | $ 0.01 | $ (0.02) | $ 0 | $ 0.02 | $ 0.00 |  | $ 0.01 |  | $ (0.08) |
Gain on disposal of discontinued operations, net of taxes (in dollars per share) |  |  |  |  | $ (0.02) | $ 0.16 | $ 0 | $ 0 | $ 0.00 |  | $ 0.14 |  | $ 0.00 |
Net (loss) income per common share (in dollars per share) | $ (0.06) | $ (0.05) | $ (0.10) | $ (0.09) | $ (0.01) | $ 0.54 | $ 0.23 | $ (0.03) | $ (0.30) |  | $ 0.73 | [1] | $ 0.36 |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations, net of taxes | (861,000) | (472,000) | (1,009,000) | (807,000) | (41,000) | 4,421,000 | 2,552,000 | (533,000) | (3,149,000) |  | 6,399,000 | [1] | 4,882,000 |
Loss from discontinued operations, net of taxes | 229,000 |  |  |  | 189,000 |  |  |  |  |  |  |  |  |
Net (loss) income | (632,000) | (533,000) | (1,069,000) | (945,000) | (120,000) | 6,011,000 | 2,520,000 | (321,000) | (3,179,000) |  | 8,090,000 | [1] | 3,963,000 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | (633,000) | (554,000) | (1,171,000) | (1,001,000) | (142,000) | 6,011,000 | 2,520,000 | (321,000) | (3,359,000) |  | 8,068,000 | [1] | 3,963,000 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.08) | $ (0.04) | $ (0.10) | $ (0.08) | $ 0 | $ 0.40 | $ 0.23 | $ (0.05) | $ (0.3) |  | $ 0.58 |  | $ 0.44 |
Discontinued operations (in dollars per share) | $ 0.02 | $ (0.01) | $ 0 | $ (0.01) | $ 0.01 | $ (0.02) | $ 0 | $ 0.02 | $ 0 |  | $ 0.01 |  | $ (0.08) |
Gain on disposal of discontinued operations, net of taxes (in dollars per share) |  |  |  |  | $ (0.02) | $ 0.16 | $ 0 | $ 0 | $ 0 |  | $ 0.14 |  | $ 0 |
Net (loss) income per common share (in dollars per share) | $ (0.06) | $ (0.05) | $ (0.10) | $ (0.09) | $ (0.01) | $ 0.54 | $ 0.23 | $ (0.03) | $ (0.3) |  | $ 0.73 | [1] | $ 0.36 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.08) | $ (0.04) | $ (0.10) | $ (0.08) | $ 0 | $ 0.40 | $ 0.23 | $ (0.05) | $ (0.30) |  | $ 0.58 |  | $ 0.44 |
Discontinued operations (in dollars per share) | $ 0.02 | $ (0.01) | $ 0 | $ (0.01) | $ 0.01 | $ (0.02) | $ 0 | $ 0.02 | $ 0.00 |  | $ 0.01 |  | $ (0.08) |
Gain on disposal of discontinued operations, net of taxes (in dollars per share) |  |  |  |  | $ (0.02) | $ 0.16 | $ 0 | $ 0 | $ 0.00 |  | $ 0.14 |  | $ 0.00 |
Net (loss) income per common share (in dollars per share) | $ (0.06) | $ (0.05) | $ (0.10) | $ (0.09) | $ (0.01) | $ 0.54 | $ 0.23 | $ (0.03) | $ (0.30) |  | $ 0.73 | [1] | $ 0.36 |
As Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaudited quarterly operating results are summarized as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations | (4,262,000) |  |  |  | 5,132,000 |  |  |  | (6,550,000) |  | 11,572,000 |  | 3,271,000 |
(Loss) income from discontinued operations, net of taxes |  |  |  |  |  |  |  |  | (458,000) |  | (2,286,000) |  | 663,000 |
Net (loss) income | (3,545,000) |  |  |  | 5,648,000 |  |  |  | (6,092,000) |  | 13,858,000 |  | 2,608,000 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | (3,546,000) |  |  |  | 5,626,000 |  |  |  | (6,272,000) |  | 13,836,000 |  | 2,608,000 |
Basic net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.38) |  |  |  | $ 0.46 |  |  |  | $ (0.60) |  | $ 1.04 |  | $ 0.30 |
Discontinued operations (in dollars per share) | $ 0.06 |  |  |  | $ 0.07 |  |  |  | $ 0.04 |  | $ 0.07 |  | $ (0.06) |
Net (loss) income per common share (in dollars per share) | $ (0.32) |  |  |  | $ 0.51 |  |  |  | $ (0.56) |  | $ 1.25 |  | $ 0.24 |
Diluted net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.38) |  |  |  | $ 0.46 |  |  |  | $ (0.60) |  | $ 1.04 |  | $ 0.30 |
Discontinued operations (in dollars per share) | $ 0.06 |  |  |  | $ 0.07 |  |  |  | $ 0.04 |  | $ 0.07 |  | $ (0.06) |
Net (loss) income per common share (in dollars per share) | $ (0.32) |  |  |  | $ 0.51 |  |  |  | $ (0.56) |  | $ 1.25 |  | $ 0.24 |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations, net of taxes | (4,262,000) |  |  |  | 5,132,000 |  |  |  | (6,550,000) |  | 11,572,000 |  | 3,271,000 |
Loss from discontinued operations, net of taxes | 717,000 |  |  |  | 784,000 |  |  |  |  |  |  |  |  |
Net (loss) income | (3,545,000) |  |  |  | 5,648,000 |  |  |  | (6,092,000) |  | 13,858,000 |  | 2,608,000 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | (3,546,000) |  |  |  | 5,626,000 |  |  |  | (6,272,000) |  | 13,836,000 |  | 2,608,000 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.38) |  |  |  | $ 0.46 |  |  |  | $ (0.60) |  | $ 1.04 |  | $ 0.30 |
Discontinued operations (in dollars per share) | $ 0.06 |  |  |  | $ 0.07 |  |  |  | $ 0.04 |  | $ 0.07 |  | $ (0.06) |
Net (loss) income per common share (in dollars per share) | $ (0.32) |  |  |  | $ 0.51 |  |  |  | $ (0.56) |  | $ 1.25 |  | $ 0.24 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.38) |  |  |  | $ 0.46 |  |  |  | $ (0.60) |  | $ 1.04 |  | $ 0.30 |
Discontinued operations (in dollars per share) | $ 0.06 |  |  |  | $ 0.07 |  |  |  | $ 0.04 |  | $ 0.07 |  | $ (0.06) |
Net (loss) income per common share (in dollars per share) | $ (0.32) |  |  |  | $ 0.51 |  |  |  | $ (0.56) |  | $ 1.25 |  | $ 0.24 |
Restatement Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unaudited quarterly operating results are summarized as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 0 | [3] |  |
Gross profit |  |  |  |  |  |  |  |  |  |  | 0 | [3] |  |
(Loss) income from continuing operations | 3,401,000 |  |  |  | (5,173,000) |  |  |  | 3,401,000 |  | (5,173,000) |  | 1,611,000 |
(Loss) income from discontinued operations, net of taxes |  |  |  |  |  |  |  |  | 488,000 |  | 595,000 |  | 256,000 |
Net (loss) income | 2,913,000 |  |  |  | (5,768,000) |  |  |  | 2,913,000 |  | (5,768,000) |  | 1,355,000 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | 2,913,000 |  |  |  | (5,768,000) |  |  |  | 2,913,000 |  | (5,768,000) |  | 1,355,000 |
Basic net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ 0.30 |  |  |  | $ (0.46) |  |  |  | $ 0.30 |  | $ (0.46) |  | $ 0.14 |
Discontinued operations (in dollars per share) | $ (0.04) |  |  |  | $ (0.06) |  |  |  | $ (0.04) |  | $ (0.06) |  | $ (0.02) |
Net (loss) income per common share (in dollars per share) | $ 0.26 |  |  |  | $ (0.52) |  |  |  | $ 0.26 |  | $ (0.52) |  | $ 0.12 |
Diluted net income (loss) per common share attributable to Perma-Fix Environmental Services, Inc. stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ 0.30 |  |  |  | $ (0.46) |  |  |  | $ 0.30 |  | $ (0.46) |  | $ 0.14 |
Discontinued operations (in dollars per share) | $ (0.04) |  |  |  | $ (0.06) |  |  |  | $ (0.04) |  | $ (0.06) |  | $ (0.02) |
Net (loss) income per common share (in dollars per share) | $ 0.26 |  |  |  | $ (0.52) |  |  |  | $ 0.26 |  | $ (0.52) |  | $ 0.12 |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations, net of taxes | 3,401,000 |  |  |  | (5,173,000) |  |  |  | 3,401,000 |  | (5,173,000) |  | 1,611,000 |
Loss from discontinued operations, net of taxes | (488,000) |  |  |  | (595,000) |  |  |  |  |  |  |  |  |
Net (loss) income | 2,913,000 |  |  |  | (5,768,000) |  |  |  | 2,913,000 |  | (5,768,000) |  | 1,355,000 |
Net (loss) income attributable to Perma-Fix Environmental Services, Inc., common stockholders | $ 2,913,000 |  |  |  | $ (5,768,000) |  |  |  | $ 2,913,000 |  | $ (5,768,000) |  | $ 1,355,000 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ 0.30 |  |  |  | $ (0.46) |  |  |  | $ 0.30 |  | $ (0.46) |  | $ 0.14 |
Discontinued operations (in dollars per share) | $ (0.04) |  |  |  | $ (0.06) |  |  |  | $ (0.04) |  | $ (0.06) |  | $ (0.02) |
Net (loss) income per common share (in dollars per share) | $ 0.26 |  |  |  | $ (0.52) |  |  |  | $ 0.26 |  | $ (0.52) |  | $ 0.12 |
Net (loss) income per common share attributable to Perma-Fix Environmental Services, Inc. stockholders - diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ 0.30 |  |  |  | $ (0.46) |  |  |  | $ 0.30 |  | $ (0.46) |  | $ 0.14 |
Discontinued operations (in dollars per share) | $ (0.04) |  |  |  | $ (0.06) |  |  |  | $ (0.04) |  | $ (0.06) |  | $ (0.02) |
Net (loss) income per common share (in dollars per share) | $ 0.26 |  |  |  | $ (0.52) |  |  |  | $ 0.26 |  | $ (0.52) |  | $ 0.12 |
[1] | As presented in the accompanying consolidated financial statements contained herein within this Form 10-K/A – Amendment No. 1.
[2] | Net of taxes of $1,276,000 for year ended December 31, 2011.
[3] | Reflects effect of restatement as discussed in “Note 1A – Restatement of Consolidated Financial Statements” in this Form 10-K/A – Amendment No. 1.

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