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Quarterly Information (unaudited) (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended
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Feb. 28, 2013 | Nov. 30, 2012 | May 31, 2014 Navilyst [Member] | Feb. 28, 2014 Navilyst [Member] | Nov. 30, 2013 Navilyst [Member] | Aug. 31, 2013 Navilyst [Member] | May 31, 2013 Navilyst [Member] | Feb. 28, 2013 Navilyst [Member] | Nov. 30, 2012 Navilyst [Member] | Aug. 31, 2012 Navilyst [Member] | Nov. 30, 2012 Vortex Medical [Member] | May 31, 2014 Vortex Medical [Member] | May 31, 2013 Vortex Medical [Member] | Aug. 31, 2013 Clinical Devices, B.V. [Member] | Feb. 28, 2013 Vortex and Microsulis Medical Ltd [Member] | Nov. 30, 2012 Vortex Medical [Member]
Quarterly Information (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of related cost\transaction and related costs |  |  | $ 1,300,000 | $ 1,400,000 | $ 1,600,000 | $ 1,200,000 | $ 2,100,000 | $ 1,300,000 | $ 1,700,000 | $ 2,200,000 |  | $ 162,000 | $ 645,000 | $ 300,000 | $ 414,000 | $ 325,000
Consolidation charges |  |  | 400,000 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Litigation related costs |  |  | 1,100,000 |  | 800,000 |  | 580,000 |  |  |  | 425,000 |  |  |  | 901,000 |
Quarterly Information (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs related to the discontinuance of product line |  |  |  |  |  |  |  | 1,600,000 |  |  |  |  |  |  |  |
Transaction and related costs, UK facility | 920,000 | 476,000 |  |  |  |  | 717,000 |  |  | 337,000 |  |  |  |  |  |
Gain (loss) on sale of product line |  |  |  |  |  |  |  |  |  |  | $ 770,000 |  |  |  |  |

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- Definition Amount of gain (loss) recognized in earnings related to the sale of a product line. + References No definition available. + Details
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- Definition Litigation costs. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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