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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2021
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	$ (1,200)	$ 1,300	$ (400)
Foreign Currency Transaction Gain (Loss), before Tax, Total	(400)	300	(300)
Contract with Customer, Liability, Total		200		$ 1,000
Debt Securities, Available-for-sale, Noncurrent	$ 0	0
Number of Reporting Units	2
Goodwill, Impairment Loss	$ 0	$ 42,520	$ 0
Number of Operating Segments	1
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	16 years
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| DePuy Mitek Inc [Member]
Concentration Risk, Percentage	45.00%	49.00%
Customer Concentration Risk [Member] \| Revenue from Contract with Customer, Product and Service Benchmark [Member] \| DePuy Mitek Inc [Member]
Concentration Risk, Percentage			71.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| DePuy Mitek Inc [Member]
Concentration Risk, Percentage	41.00%	44.00%