Acquisition Of On-X Life Technologies (Preliminary Pro Forma Information) (Details) - On-X Agreement [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Business Acquisition [Line Items]
Total revenues	$ 44,643	$ 41,612
Net income	$ 5,661	$ (12,447)
Pro forma income per common share-basic	$ 0.17	$ (0.39)
Pro forma income per common share-diluted	$ 0.17	$ (0.39)
Pro forma tax rate	38.00%	38.00%

Business Acquisition, Pro Forma, Tax Rate

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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