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Debt Narrative - Senior Secured Notes and Revolving Credit Facility - Food Packaging (Details) (Food Packaging Segment [Member], USD $)	6 Months Ended	12 Months Ended			0 Months Ended										6 Months Ended	12 Months Ended
	Jun. 30, 2012 Secured Debt [Member] Viskase Notes Indenture [Member]	Dec. 31, 2011 Secured Debt [Member] Viskase Notes Indenture [Member]	May 31, 2010 Secured Debt [Member] Viskase Notes Indenture [Member]	Dec. 31, 2009 Secured Debt [Member] Viskase Senior Secured Notes due 2018 [Member]	Nov. 30, 2007 Secured Debt [Member] Revolving Credit Facility [Member]	Jun. 30, 2012 Secured Debt [Member] Revolving Credit Facility [Member]	Dec. 31, 2011 Secured Debt [Member] Revolving Credit Facility [Member]	Dec. 31, 2010 Secured Debt [Member] Revolving Credit Facility [Member]	Jun. 30, 2012 Secured Debt [Member] Letter of Credit [Member]	Dec. 31, 2011 Secured Debt [Member] Letter of Credit [Member]	Dec. 31, 2010 Secured Debt [Member] Letter of Credit [Member]	Jun. 30, 2012 Unsecured Debt [Member] Line of Credit [Member]	Dec. 31, 2011 Unsecured Debt [Member] Line of Credit [Member]	Dec. 31, 2010 Unsecured Debt [Member] Line of Credit [Member]	Jun. 30, 2012 Debt repurchase date range, Prior to January 15, 2014 [Member] Secured Debt [Member] Viskase Notes Indenture [Member]	Dec. 31, 2011 Debt repurchase date range, Prior to January 15, 2014 [Member] Secured Debt [Member] Viskase Notes Indenture [Member]	Nov. 30, 2007 Maximum [Member] Secured Debt [Member] Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued, long-term debt			$ 40,000,000	$ 175,000,000
Interest rate, long-term debt			9.875%	9.875%
Redemption percentage of aggregate principal amount authorized to be redeemed at higher percenatge of principal amount	35.00%	35.00%
Redemtion percentage of principal amount															109.875%	109.875%
Percentage of aggregate principal amount required to remain outstanding if debt redeemed at higher percenatge of principal amount	65.00%	65.00%
Line of credit facility					25,000,000							8,000,000	8,000,000
Percentage spread on debt						2.00%	2.00%										2.50%
Debt Instrument, Interest Rate Floor					3.00%
Revolving credit facility unused line fee					0.375%
Line of credit facility, outstanding borowings						0	0	0				0	0	0
Letters of Credit Outstanding, Amount									$ 1,000,000	$ 1,000,000	$ 2,000,000

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- Definition

Debt Instrument, Interest Rate Floor

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- Definition

Debt Instrument, Percentage of Aggregate Principal Amount Authorized to be Repurchased at Higher Percenatge of Principal Amount

+ References

No definition available.

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- Definition

Debt Instrument, Percentage of Aggregate Principal Amount Required to Remain Outstanding if Debt Redeemed at Higher Percenatge of Principal Amount

+ References

No definition available.

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- Definition

Debt Instrument, Repurchase Percentage of Principal Amount, excluding accrued and unpaid interest

+ References

No definition available.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400



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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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