|
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
|
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
Permit
Segment
|
Dec. 31, 2011
|
Dec. 31, 2010
Segment
|
Dec. 31, 2009
|
| Restricted Cash [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Restricted cash held in escrow for worker's compensation policy |
$ 35,000
|
|
|
|
|
|
|
|
$ 35,000
|
|
|
|
|
|
|
| Escrow deposit received |
|
|
|
|
|
|
|
|
|
|
1,500,000
|
|
|
|
|
| Accounts Receivable [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Accounts receivable payment term |
|
|
|
|
|
|
|
|
payment within 30 or 60 days from the invoice date
|
|
|
|
|
|
|
| Minimum period to review accounts receivable |
|
|
|
|
|
|
|
|
60 days
|
|
|
|
|
|
|
| Minimum period for unbilled receivables |
|
|
|
|
|
|
|
|
12 months
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Tangible asset impairment |
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
| Depreciation expense |
|
|
|
|
|
|
|
|
4,795,000
|
|
4,575,000
|
|
4,451,000
|
|
|
| Capitalized Interest [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Minimum period for construction of major projects to capitalize interest cost |
|
|
|
|
|
|
|
|
1 year
|
|
|
|
|
|
|
| Interest costs capitalized during the period |
|
|
|
|
|
|
|
|
0
|
|
0
|
|
0
|
|
|
| Goodwill and Other Intangible Assets [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Number of reporting units |
|
|
|
|
|
|
|
|
4
|
|
|
|
2
|
|
|
| Goodwill [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Reassignment of goodwill from change in reporting unit |
|
|
|
|
|
|
|
|
|
|
0
|
|
|
|
|
| Goodwill |
29,186,000
|
|
|
|
29,186,000
|
|
|
|
29,186,000
|
|
29,186,000
|
|
15,330,000
|
|
|
| Number of definite lived permit |
|
|
|
|
|
|
|
|
1
|
|
|
|
|
|
|
| Permit capitalized amount |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
545,000
|
| Amortization period of permit |
|
|
|
|
|
|
|
|
P10Y
|
|
|
|
|
|
|
| Income Taxes [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Minimum likelihood of tax benefit to be realized (in hundredths) |
|
|
|
|
|
|
|
|
50.00%
|
|
|
|
|
|
|
| Revenue Recognition [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Number of processing phases |
|
|
|
|
|
|
|
|
3
|
|
|
|
|
|
|
| Self Insurance [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Self-insurance reserve |
644,000
|
|
|
|
475,000
|
|
|
|
644,000
|
|
475,000
|
|
|
|
|
| Self-insurance expenses for continuing operations |
|
|
|
|
|
|
|
|
4,388,000
|
|
3,041,000
|
|
2,896,000
|
|
|
| Self insurance expenses for discontinued operations |
|
|
|
|
|
|
|
|
171,000
|
|
311,000
|
|
314,000
|
|
|
| Comprehensive Income [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Foreign currency translation gain (loss) |
|
|
|
|
|
|
|
|
1,000
|
|
(3,000)
|
|
0
|
|
|
| Income per share from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| (Loss) income from continuing operations |
|
|
|
|
|
|
|
|
(6,550,000)
|
|
11,572,000
|
|
3,271,000
|
|
|
| Basic (loss) income per share (in dollars per share) |
$ (0.07)
|
$ (0.01)
|
$ (0.02)
|
$ (0.02)
|
$ 0.09
|
$ 0.08
|
$ 0.05
|
$ (0.01)
|
$ (0.12)
|
|
$ 0.21
|
|
$ 0.06
|
|
|
| Diluted (loss) income per share (in dollars per share) |
$ (0.07)
|
$ (0.01)
|
$ (0.02)
|
$ (0.02)
|
$ 0.09
|
$ 0.08
|
$ 0.05
|
$ (0.01)
|
$ (0.12)
|
|
$ 0.21
|
|
$ 0.06
|
|
|
| Income (loss) per share from discontinued operations attributable to Perma-Fix Environmental Services, Inc. common stockholders [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| (Loss) income from discontinued operations |
|
|
|
|
|
|
|
|
458,000
|
|
777,000
|
|
(663,000)
|
|
|
| Basic income (loss) per share (in dollars per share) |
$ 0.01
|
$ 0
|
$ 0
|
$ 0
|
$ 0.01
|
$ 0
|
$ 0
|
$ 0
|
$ 0.01
|
|
$ 0.01
|
|
$ (0.01)
|
|
|
| Diluted income (loss) per share (in dollars per share) |
$ 0.01
|
$ 0
|
$ 0
|
$ 0
|
$ 0.01
|
$ 0
|
$ 0
|
$ 0
|
$ 0.01
|
|
$ 0.01
|
|
$ (0.01)
|
|
|
| Income per share from disposal of discontinued operations attributable to Perma-Fix Environmental Services, Inc. common stockholders [Abstract] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Gain on disposal of discontinued operations |
|
|
|
|
(268,000)
|
1,777,000
|
0
|
0
|
0
|
[1] |
1,509,000
|
[1] |
0
|
[1] |
|
| Basic income per share (in dollars per share) |
|
|
|
|
|
|
|
|
$ 0
|
|
$ 0.03
|
|
$ 0
|
|
|
| Diluted income per share (in dollars per share) |
|
|
|
|
|
|
|
|
$ 0
|
|
$ 0.03
|
|
$ 0
|
|
|
| Weighted average common shares outstanding - basic (in shares) |
|
|
|
|
|
|
|
|
56,125
|
|
55,295
|
|
54,947
|
|
|
| Potential shares exercisable under stock option plans (in shares) |
|
|
|
|
|
|
|
|
0
|
|
22
|
|
56
|
|
|
| Potential shares upon exercise of warrants (in shares) |
|
|
|
|
|
|
|
|
0
|
|
0
|
|
27
|
|
|
| Weighted average common shares outstanding - diluted (in shares) |
|
|
|
|
|
|
|
|
56,125
|
|
55,317
|
|
55,030
|
|
|
|
Stock Options [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect (in shares) |
|
|
|
|
|
|
|
|
2,584
|
|
2,549
|
|
2,195
|
|
|
|
Warrant [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect (in shares) |
|
|
|
|
|
|
|
|
0
|
|
150
|
|
0
|
|
|
|
Accounts Receivable [Member] | Clauss Construction [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total AR |
3,343,000
|
|
|
|
3,114,000
|
|
|
|
3,343,000
|
|
3,114,000
|
|
|
|
|
| Percent of Total A/R (in hundredths) |
|
|
|
|
|
|
|
|
29.30%
|
|
18.50%
|
|
|
|
|
|
Accounts Receivable [Member] | Department of Energy ("DOE") [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Total AR |
1,753,000
|
|
|
|
2,656,000
|
|
|
|
1,753,000
|
|
2,656,000
|
|
|
|
|
| Percent of Total A/R (in hundredths) |
|
|
|
|
|
|
|
|
15.40%
|
|
15.80%
|
|
|
|
|
|
Revenue [Member] | Federal Government [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Revenue from major customer |
|
|
|
|
|
|
|
|
101,533,000
|
|
99,660,000
|
|
80,275,000
|
|
|
| Percentage of revenue from major customer (in hundredths) |
|
|
|
|
|
|
|
|
79.60%
|
|
84.50%
|
|
82.10%
|
|
|
|
Revenue [Member] | CH Plateau Remediation Company [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Revenue from major customer |
|
|
|
|
|
|
|
|
24,652,000
|
|
59,136,000
|
|
51,929,000
|
|
|
| Percentage of revenue from major customer (in hundredths) |
|
|
|
|
|
|
|
|
19.30%
|
|
49.90%
|
|
53.10%
|
|
|
|
Revenue [Member] | Department of Energy ("DOE") [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Revenue from major customer |
|
|
|
|
|
|
|
|
26,309,000
|
|
4,157,000
|
|
0
|
|
|
| Percentage of revenue from major customer (in hundredths) |
|
|
|
|
|
|
|
|
20.60%
|
|
3.50%
|
|
0.00%
|
|
|
|
Treatment [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Reassignment of goodwill from change in reporting unit |
|
|
|
|
|
|
|
|
|
|
(1,149,000)
|
|
|
|
|
| Goodwill |
13,691,000
|
|
|
|
13,691,000
|
|
|
|
13,691,000
|
|
13,691,000
|
|
14,000,000
|
|
|
| Reassignment of goodwill to correct initial calculation |
|
2,488,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CHPRC [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Goodwill [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Reassignment of goodwill from change in reporting unit |
|
|
|
|
3,637,000
|
|
|
|
|
|
|
|
|
|
|
| Goodwill |
|
$ 3,637,000
|
|
|
$ 14,840,000
|
|
|
|
|
|
$ 14,840,000
|
|
|
|
|
|
Building and Building Improvements [Member] | Minimum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
|
|
|
Building and Building Improvements [Member] | Maximum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
40 years
|
|
|
|
|
|
|
|
Office Furniture And Equipment [Member] | Minimum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
3 years
|
|
|
|
|
|
|
|
Office Furniture And Equipment [Member] | Maximum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
7 years
|
|
|
|
|
|
|
|
Vehicles [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
5 years
|
|
|
|
|
|
|
|
Vehicles [Member] | Minimum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
3 years
|
|
|
|
|
|
|
|
Vehicles [Member] | Maximum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
7 years
|
|
|
|
|
|
|
|
Decontamination And Processing Equipment [Member] | Minimum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
3 years
|
|
|
|
|
|
|
|
Decontamination And Processing Equipment [Member] | Maximum [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Property and equipment, useful life |
|
|
|
|
|
|
|
|
7 years
|
|
|
|
|
|
|
|
61-90 Days Past Due [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Accounts Receivable [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Percentage of reserves for doubtful accounts receivable (in hundredths) |
|
|
|
|
|
|
|
|
5.00%
|
|
|
|
|
|
|
|
91-120 Days Past Due [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Accounts Receivable [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Percentage of reserves for doubtful accounts receivable (in hundredths) |
|
|
|
|
|
|
|
|
20.00%
|
|
|
|
|
|
|
|
Over 120 Days Past Due [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Accounts Receivable [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Percentage of reserves for doubtful accounts receivable (in hundredths) |
|
|
|
|
|
|
|
|
40.00%
|
|
|
|
|
|
|
|
Deemed Uncollected [Member]
|
|
|
|
|
|
|
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| Accounts Receivable [Line Items] |
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| Percentage of reserves for doubtful accounts receivable (in hundredths) |
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100.00%
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