This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 3 - Business Combinations (Details Textual) - USD ($) $ in Thousands			3 Months Ended		8 Months Ended		9 Months Ended	12 Months Ended
	Feb. 03, 2020	Jan. 24, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Asset, Useful Life (Year)							13 years	11 years
Developed Technology Rights [Member]
Finite-Lived Intangible Asset, Useful Life (Year)							15 years	15 years
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)							10 years
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life (Year)							5 years
Parcus Medical [Member]
Business Combination, Consideration Transferred, Total		$ 75,136
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High		60,000
Business Combination, Acquisition Related Costs				$ 1,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory		10,968
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		44,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 3,300		$ 7,900
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			(1,600)		(4,500)
Parcus Medical [Member] \| Developed Technology Rights [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		$ 41,100
Finite-Lived Intangible Asset, Useful Life (Year)		15 years
Parcus Medical [Member] \| Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		$ 1,100
Finite-Lived Intangible Asset, Useful Life (Year)		10 years
Parcus Medical [Member] \| Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		$ 1,800
Finite-Lived Intangible Asset, Useful Life (Year)		5 years
Parcus Medical [Member] \| Trunk Stock [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory			1,900		$ 1,900	$ 1,900	$ 1,900
Arthrosurface [Member]
Business Combination, Consideration Transferred, Total	$ 90,285
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	40,000
Business Combination, Acquisition Related Costs				$ 2,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	15,652
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	48,900
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			7,200			15,600
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ (1,600)			$ 8,400
Arthrosurface [Member] \| Developed Technology Rights [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 37,000
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Arthrosurface [Member] \| Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 7,900
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Arthrosurface [Member] \| Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 3,400
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Arthrosurface [Member] \| In Process Research and Development [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 600