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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2012

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Customers accounting for 10% or more of total revenues generated from continuing operations

The following customers accounted for 10% or more of the total revenues generated from continuing operations for twelve months ended December 31, 2012, 2011, and 2010:

						Total				% of Total
Customer		Year				Revenue				Revenue
CH Plateau Remediation Company ("CHPRC")			2012			$	24,652,000				19.3	%
			2011			$	59,136,000				50.1	%
			2010			$	51,929,000				53.1	%
Department of Energy ("DOE")			2012			$	26,265,000				20.6	%
			2011			$	4,136,000				3.5	%
			2010			$	0				0.0	%

Receivable balance for each customer representing more than 10% of consolidated receivable

The outstanding receivable balance for each customer representing more than 10% of consolidated accounts receivable is ("AR") as follows:

						Total				% of Total
Customer		Year				AR				AR
DOE			2012			$	1,753,000				15.4	%
			2011			$	2,656,000				15.8	%
Clauss Construction			2012			$	3,343,000				29.3	%
			2011			$	3,114,000				18.5	%

Reconciliation of basic net income (loss) per share to diluted net (loss) income per share

The following is a reconciliation of basic net (loss) income per share to diluted net (loss) income per share for the years ended December 31, 2012, 2011, and 2010:

		(Restated)				(Restated)				(Restated)
(Amounts in Thousands, Except for Per Share Amounts)		2012				2011				2010
(Loss) income per share from continuing operations attributable to Perma-Fix Environmental Services, Inc. common stockholders
(Loss) income from continuing operations		$	(3,329	)		$	6,377			$	4,882
Basic (loss) income per share		$	(.30	)		$	.58			$	.44
Diluted (loss) income per share		$	(.30	)		$	.58			$	.44
Income (loss) per share from discontinued operations attributable to Perma-Fix Environmental Services, Inc. common stockholders
(loss) Income from discontinued operations		$	(30	)		$	182			$	(919	)
Basic income (loss) per share		$	¾			$	.01			$	(.08	)
Diluted income (loss) per share		$	¾			$	.01			$	(.08	)
Income per share from disposal of discontinued operations attributable to Perma-Fix Environmental Services, Inc. common stockholders
Gain on disposal of discontinued operations		$	¾			$	1,509			$	¾
Basic income per share		$	¾			$	.14			$	¾
Diluted income per share		$	¾			$	.14			$	¾
Weighted average common shares outstanding – basic			11,225				11,059				10,989
Potential shares exercisable under stock option plans			¾				4				11
Potential shares upon exercise of warrants			¾				¾				5
Weighted average common shares outstanding – diluted			11,225				11,063				11,006

Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect

Potential shares excluded from above weighted average share calculations due to their anti-dilutive effect include:
Upon exercise of options			517				510				439
Upon exercise of Warrants			¾				30				¾

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Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

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-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

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Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit).

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Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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