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Fair Value Measurements (Quantitative Information about Unobservable Inputs, Liabilities) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2015 | May. 31, 2015 | May. 31, 2015 | May. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |
Payment of contingent consideration |  |  | $ 0 | $ (210)
Asset impairment |  | $ 3,900 | 3,947 | $ 0
Modulus [Member] |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |
Change in fair value of contingent consideration |  | $ (1,100) | $ (1,200) |
Modulus [Member] | Contingent Consideration [Member] |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |
Probability milestones associated with contingent consideration will be achieved, Year 1 |  |  | 0.00% |
Probability milestones associated with contingent consideration will be achieved, Year 2 |  |  | 40.00% |
Contingent consideration, discount rate |  |  | 33.00% |
Subsequent Event [Member] |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |
Payment of contingent consideration | $ (200) |  |  |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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