Additional Business Combinations.

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Business Acquisition Discount Rates Used In Valuation Methods Range Maximum.

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Business Acquisition Discount Rates Used In Valuation Methods Range Minimum.

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Business Combinations.

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- Definition

Amount of cash paid to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph f(1)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

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Amount of deferred tax assets or liabilities for the differences between the values assigned and the tax bases of assets and liabilities in a business combination, net of any valuation allowance for deferred tax assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph e

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 38

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 52
-Subparagraph c

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 53
-Subparagraph d

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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Business Combinations (Details Textuals) (USD $)	6 Months Ended			6 Months Ended
Business Combinations (Details Textuals) (USD $)	Jun. 30, 2011	Jun. 30, 2011 GTI Diagnostics [Member]	Dec. 31, 2010 GTI Diagnostics [Member]	Jun. 30, 2011 Patents [Member]	Jun. 30, 2011 Customer Relationships [Member]	Jun. 30, 2011 Trademarks And Trade Names [Member]
Business Combinations (Textuals) [Abstract]
Acquisition of GTI Diagnostics on a net-cash basis			$ 53,000,000
Amortization period of acquired intangible assets, Minimum				6
Amortization period of acquired intangible assets, Maximum				9	10	20
Total purchase price		53,000,000
Purchase price allocated to goodwill		28,040,000
Deferred tax liabilities included in initial goodwill		$ 11,137,000
Additional Business Combinations (Textuals) [Abstract]
Discount rates used in valuation methods, minimum range	13.00%
Discount rates used in valuation methods, maximum range	16.00%