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Acquisition Of On-X Life Technologies (Narrative) (Details) - USD ($) $ in Thousands				9 Months Ended
	Jan. 20, 2016	Jan. 20, 2016	Dec. 22, 2015	Sep. 30, 2016
Business Acquisition [Line Items]
Cash consideration				$ 1,226
Total purchase price				$ 91,152
On-X Agreement [Member]
Business Acquisition [Line Items]
Agreement date				Dec. 22, 2015
Acquisition price	$ 128,200
Close date				Jan. 20, 2016
Total purchase price	$ 128,217	$ 128,217
Cash consideration		$ 93,600
Common shares issued		3,703,699
Common stock consideration		$ 34,600
Transaction and integration costs				$ 6,800
Plan [Member] | On-X Agreement [Member]
Business Acquisition [Line Items]
Acquisition price			$ 130,000

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