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Note 15 - Revenue by Product Group, by Significant Customer and by Geographic Location; Geographic Information (Details Textual) - USD ($)	1 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2003	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2012
Concentration Risk, Percentage			100.00%	100.00%	100.00%
Sales Revenue, Services, Net			$ 5,637,000	$ 447,000	$ 5,303,000
Mitek ORTHOVISC Agreement [Member]
License Agreement Term		10 years
License Agreement Additional Term			5 years			5 years
Mitek MONOVISC Agreement [Member]
License Agreement Term	15 years
Revenue Recognition, Milestone Method, Revenue Recognized			$ 5,000,000	$ 0	5,000,000
Revenue Recognition, Milestone Method, Revenue Milestone in Twelve Month Period			$ 100,000,000		$ 50,000,000
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | DePuy Mitek Inc [Member]
Concentration Risk, Percentage			73.00%	75.00%	72.00%

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