Note 4 - Acquisitions and Divestitures - Acquired Intangible Assets and Related Estimated Useful Lives (Details) € in Thousands, $ in Thousands					3 Months Ended
	Oct. 11, 2019 USD ($)	Jul. 12, 2019 USD ($)	Oct. 22, 2018 EUR (€)	Sep. 20, 2018 USD ($)	Mar. 31, 2020
Weighted Average Useful Life (Year)					10 years 73 days
CardioCel and VascuCel Biologic Patches [Member]
Intangible assets	$ 8,725
Weighted Average Useful Life (Year)	10 years 146 days
CardioCel and VascuCel Biologic Patches [Member] | Customer Relationships [Member]
Intangible assets	$ 5,562
Weighted Average Useful Life (Year)	12 years
CardioCel and VascuCel Biologic Patches [Member] | Intellectual Property [Member]
Intangible assets	$ 2,335
Weighted Average Useful Life (Year)	8 years
CardioCel and VascuCel Biologic Patches [Member] | Noncompete Agreements [Member]
Intangible assets	$ 361
Weighted Average Useful Life (Year)	5 years
CardioCel and VascuCel Biologic Patches [Member] | Trade Names [Member]
Intangible assets	$ 467
Weighted Average Useful Life (Year)	8 years
Tru-Incise Valve Cutter [Member]
Intangible assets		$ 4,844
Weighted Average Useful Life (Year)		11 years 292 days
Tru-Incise Valve Cutter [Member] | Customer Relationships [Member]
Intangible assets		$ 3,945
Weighted Average Useful Life (Year)		13 years
Tru-Incise Valve Cutter [Member] | Intellectual Property [Member]
Intangible assets		$ 563
Weighted Average Useful Life (Year)		7 years
Tru-Incise Valve Cutter [Member] | Noncompete Agreements [Member]
Intangible assets		$ 233
Weighted Average Useful Life (Year)		5 years
Tru-Incise Valve Cutter [Member] | Trade Names [Member]
Intangible assets		$ 103
Weighted Average Useful Life (Year)		7 years
Cardial [Member]
Intangible assets | €			€ 623
Weighted Average Useful Life (Year)			9 years 146 days
Cardial [Member] | Customer Relationships [Member]
Intangible assets | €			€ 250
Weighted Average Useful Life (Year)			16 years
Cardial [Member] | Intellectual Property [Member]
Intangible assets | €			€ 237
Weighted Average Useful Life (Year)			5 years
Cardial [Member] | Noncompete Agreements [Member]
Intangible assets | €			€ 46
Weighted Average Useful Life (Year)			5 years
Cardial [Member] | Trade Names [Member]
Intangible assets | €			€ 90
Weighted Average Useful Life (Year)			5 years
Applied Medical [Member]
Intangible assets				$ 6,527
Weighted Average Useful Life (Year)				13 years
Applied Medical [Member] | Customer Relationships [Member]
Intangible assets				$ 4,475
Weighted Average Useful Life (Year)				16 years
Applied Medical [Member] | Intellectual Property [Member]
Intangible assets				$ 1,316
Weighted Average Useful Life (Year)				7 years
Applied Medical [Member] | Noncompete Agreements [Member]
Intangible assets				$ 530
Weighted Average Useful Life (Year)				5 years
Applied Medical [Member] | Trade Names [Member]
Intangible assets				$ 206
Weighted Average Useful Life (Year)				7 years