Note 4 - Acquisitions and Divestitures - Acquired Intangible Assets and Related Estimated Useful Lives (Details) € in Thousands, $ in Thousands				9 Months Ended
	Jul. 12, 2019 USD ($)	Oct. 22, 2018 EUR (€)	Sep. 20, 2018 USD ($)	Sep. 30, 2019
Weighted average useful life (Year)				11 years
Tru-Incise Valve Cutter [Member]
Allocated fair value	$ 4,727
Weighted average useful life (Year)	14 years 73 days
Tru-Incise Valve Cutter [Member] | Customer Relationships [Member]
Allocated fair value	$ 3,865
Weighted average useful life (Year)	16 years
Tru-Incise Valve Cutter [Member] | Intellectual Property [Member]
Allocated fair value	$ 558
Weighted average useful life (Year)	7 years
Tru-Incise Valve Cutter [Member] | Noncompete Agreements [Member]
Allocated fair value	$ 201
Weighted average useful life (Year)	5 years
Tru-Incise Valve Cutter [Member] | Trade Names [Member]
Allocated fair value	$ 103
Weighted average useful life (Year)	7 years
Cardial [Member]
Allocated fair value | €		€ 623
Weighted average useful life (Year)		9 years 146 days
Cardial [Member] | Customer Relationships [Member]
Allocated fair value | €		€ 250
Weighted average useful life (Year)		16 years
Cardial [Member] | Intellectual Property [Member]
Allocated fair value | €		€ 237
Weighted average useful life (Year)		5 years
Cardial [Member] | Noncompete Agreements [Member]
Allocated fair value | €		€ 46
Weighted average useful life (Year)		5 years
Cardial [Member] | Trade Names [Member]
Allocated fair value | €		€ 90
Weighted average useful life (Year)		5 years
Applied Medical [Member]
Allocated fair value			$ 6,527
Weighted average useful life (Year)			13 years
Applied Medical [Member] | Customer Relationships [Member]
Allocated fair value			$ 4,475
Weighted average useful life (Year)			16 years
Applied Medical [Member] | Intellectual Property [Member]
Allocated fair value			$ 1,316
Weighted average useful life (Year)			7 years
Applied Medical [Member] | Noncompete Agreements [Member]
Allocated fair value			$ 530
Weighted average useful life (Year)			5 years
Applied Medical [Member] | Trade Names [Member]
Allocated fair value			$ 206
Weighted average useful life (Year)			7 years