This element represents the aggregate carrying amount of all cost-method investments held by the Company. Generally, such investments do not have readily determinable fair values and are not required to be accounted for by the equity method. The carrying amount of such securities equates to cost, adjusted for other-than-temporary impairment. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries, particularly foreign.

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-Paragraph 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

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-Paragraph 6

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-1

-Paragraph 22

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-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.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-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.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 50

-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

+ Details

- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References+ Details

- Definition

The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation.

+ References+ Details

Investments in Other Companies (Details) (USD $)	12 Months Ended				12 Months Ended				0 Months Ended	12 Months Ended
Investments in Other Companies (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2011 CyOptics [Member]	Dec. 31, 2011 Other Investees [Member]	Dec. 31, 2010 Other Investees [Member]	May 11, 2005 Preferred Stock [Member] CyOptics [Member]	May 11, 2005 Unsecured Promissory Note [Member] CyOptics [Member]	Dec. 31, 2011 Unsecured Promissory Note [Member] CyOptics [Member]	Dec. 31, 2010 Unsecured Promissory Note [Member] CyOptics [Member]	Dec. 31, 2008 Unsecured Promissory Note [Member] CyOptics [Member]	Apr. 02, 2011 Unsecured Promissory Note [Member] CyOptics [Member]
Schedule of Cost-method Investments [Line Items]
Cost-method Investments, Ownership Percentage				20.00%
Cost-method Investments, Aggregate Carrying Amount								$ 4,500,000					$ 0
Cost Method Investment, Gross Investment Amount									5,633,000
Cost Method Investment, Carrying Value Adjustment									2,292,000
Proceeds from Collection of Notes Receivable										1,599,000	1,480,000
Cost-method Investments, Other than Temporary Impairment												2,517,000
Investment Impairment Recovery	$ 1,363,000	$ 1,340,000	$ (116,000)		$ 1,231,000	$ 132,000	$ 1,340,000