Acquisition Of On-X Life Technologies (Pro Forma Information) (Details) - On-X Agreement [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Total revenues	$ 182,007	$ 179,266
Net income (loss)	$ 17,692	$ (4,787)
Pro forma income (loss) per common share - basic	$ 0.54	$ (0.15)
Pro forma income (loss) per common share - diluted	$ 0.53	$ (0.15)
Pro forma tax rate	38.00%	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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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=65885119&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.

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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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