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Segment And Geographic Information (Revenues, Cost Of Products And Services, And Gross Margins For Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended																	12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 69,697	[1]	$ 67,881	$ 71,139	$ 67,505	$ 67,799	$ 64,598	$ 68,496	$ 61,948	$ 52,826	[1]	$ 43,999		$ 47,818		$ 45,059		$ 276,222	$ 262,841	$ 189,702
Total cost of products and preservation services																		93,209	89,857	61,060
Total gross margin	46,552	[1]	$ 45,222	$ 46,966	$ 44,273	45,191	$ 42,714	$ 45,851	$ 39,228	36,363	[1]	$ 29,862		$ 32,905		$ 29,512		183,013	172,984	128,642
Goodwill	186,697					188,781				$ 188,305								186,697	188,781	188,305
Medical Devices [Member]
Segment Reporting Information [Line Items]
Goodwill	186,700					188,800												186,700	188,800
Operating Segments [Member] | Medical Devices [Member]
Segment Reporting Information [Line Items]
Total revenues																		197,246	187,394	119,631
Total cost of products and preservation services																		55,022	53,772	29,798
Total gross margin																		142,224	133,622	89,833
Operating Segments [Member] | Preservation Services [Member]
Segment Reporting Information [Line Items]
Total revenues																		78,976	75,447	70,071
Total cost of products and preservation services																		38,187	36,085	31,262
Total gross margin																		40,789	39,362	38,809
Domestic [Member]
Segment Reporting Information [Line Items]
Total revenues																		$ 150,553	144,651	$ 135,102
Domestic [Member] | Long-Lived Assets [Member] | Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration percentage																		57.00%
GERMANY
Segment Reporting Information [Line Items]
Long-lived assets	$ 14,100					$ 13,100												$ 14,100	$ 13,100
GERMANY | Long-Lived Assets [Member] | Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration percentage																		97.00%	98.00%
[1] In December 2017 we completed our acquisition of JOTEC, which is operated as a wholly-owned subsidiary of CryoLife.

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