Note 11 - Revenue and Geographic Information - Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 40,264	$ 39,536	$ 39,536	$ 116,614	$ 111,973
OA Pain Management [member]
Revenue	25,665	26,153		74,139	69,790
Joint Preservation and Restoration [Member]
Revenue	11,821	11,193		36,055	35,296
Non-Orthopedic [Member]
Revenue	$ 2,778	$ 2,190		$ 6,420	$ 6,887

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details