Note 12 - Fair Value Measurements (Details Textual) - CardioCel and VascuCel Biologic Patches [Member] - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2019	Oct. 11, 2019
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 7.8
Fair Value, Inputs, Level 3 [Member]
Business Combination, Contingent Consideration, Liability			$ 2.3
Audited Carve-Out Financial Statements of the Acquired Business [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		0.3
Third Holdback [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 2.0	2.0
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		0.5
Achievement of Specified Levels of Revenues [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 5.0