Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Performance Shares [Member]
Allocated Share-based Compensation Expense	$ 400,000	$ 0
Accounts Receivable [Member] | Customer Concentration Risk [Member] | DePuy Mitek Inc [Member]
Concentration Risk, Percentage	60.00%	52.00%
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	2 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	16 years
In Process Research Development [Member] | Research and Development Expense [Member]
Impairment of Intangible Assets, Finite-lived	$ 700,000
Reclassification from Current Deferred Tax Assets to a Reduction in Noncurrent Deferred Tax Liabilities [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	2,300,000
Prior Period Reclassification Adjustment	1,200,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	0	$ 0
Allocated Share-based Compensation Expense	2,200,000	1,600,000	$ 1,300,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	2,200,000	2,800,000	1,000,000
Foreign Currency Transaction Gain (Loss), before Tax	$ 400,000	$ 600,000	$ 259,000
Concentration Risk, Percentage	100.00%	100.00%	100.00%
Inventory, Net	$ 14,938,000	$ 12,407,000
Inventory Adjustments	$ 900,000	$ 900,000
Number of Reportable Segments	1