Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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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Note 13 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 11, 2019
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ (454)	$ 132
Artegraft Inc [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High					$ 17,500
Business Combination, Contingent Consideration, Liability, Total					$ 400
CardioCel and VascuCel Biologic Patches [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						$ 7,800
Business Combination, Contingent Consideration, Liability, Total				$ 2,000			$ 7,500
CardioCel and VascuCel Biologic Patches [Member] \| Audited Carve-Out Financial Statements of the Acquired Business [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						300
CardioCel and VascuCel Biologic Patches [Member] \| Third Holdback [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						2,000
Business Combination, Contingent Consideration, Liability, Total							2,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ (500)
CardioCel and VascuCel Biologic Patches [Member] \| Extension of Product Shelf Life from 36 Months to 60 Months in the First Anniversary of Closing Date [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						500
Business Combination, Contingent Consideration, Liability, Total							500
CardioCel and VascuCel Biologic Patches [Member] \| Achievement of Specified Levels of Revenues [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						$ 5,000
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure	$ 0	$ 0
Fair Value, Inputs, Level 3 [Member] \| CardioCel and VascuCel Biologic Patches [Member]
Business Combination, Contingent Consideration, Liability, Total							$ 2,300