Note 15 - Depuy Synthes Mitek Sports Medicine Agreements (Details Textual) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2003	Jun. 30, 2014	Sep. 30, 2017	Dec. 31, 2012
Mitek MONOVISC Agreement [Member]
License Agreement Term	15 years
Revenue Recognition, Milestone Method, Revenue Recognized			$ 5
Mitek ORTHOVISC Agreement [Member]
License Agreement Term		10 years
License Agreement Additional Term				5 years	5 years