Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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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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Value of input used to measure contingent consideration liability from business combination.

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Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability up to amount recognized at acquisition date, including, but not limited to, measurement period adjustment and less amount paid soon after acquisition date.

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Note 4 - Fair Value Measurements (Details Textual) $ in Thousands				1 Months Ended	3 Months Ended
	Oct. 15, 2020 USD ($)	Feb. 03, 2020 USD ($)	Jan. 24, 2020 USD ($)	Oct. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale, Total					$ 0
Payment for Contingent Consideration Liability, Financing Activities	$ 5,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					(4,820)	$ (24,522)
COVID 19 [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					4,800
Parcus Medical and Arthrosurface Acquisitions [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High					$ 100,000
Parcus Medical and Arthrosurface Acquisitions [Member] \| Measurement Input, Discount Rate [Member] \| Regulatory Earn Out Milestone [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input					0.036
Parcus Medical and Arthrosurface Acquisitions [Member] \| Measurement Input, Discount Rate [Member] \| Minimum [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input					0.026
Parcus Medical and Arthrosurface Acquisitions [Member] \| Measurement Input, Discount Rate [Member] \| Maximum [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input					0.028
Arthrosurface [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High		$ 40,000
Payment for Contingent Consideration Liability, Financing Activities				$ 5,000
Arthrosurface [Member] \| Probability of Achievement [Member] \| Minimum [Member] \| Regulatory Earn Out Milestone [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.60			0
Arthrosurface [Member] \| Probability of Achievement [Member] \| Maximum [Member] \| Regulatory Earn Out Milestone [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.75			0.70
Arthrosurface [Member] \| Measurement Input, Weighted Average Cost of Capital [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.115			0.121
Parcus Medical [Member]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High			$ 60,000
Parcus Medical [Member] \| Measurement Input, Weighted Average Cost of Capital [Member]
Business Combination, Contingent Consideration, Liability, Measurement Input			0.145		0.121
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale, Total							$ 2,500