Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total		$ (400)	$ (700)	$ 2,500
Foreign Currency Transaction Gain (Loss), before Tax, Total	$ (300)		(400)	$ 700
Contract with Customer, Liability, Total	$ 0	$ 0	$ 0
Number of Operating Segments		1
Number of Reportable Segments		1
Minimum [Member]
Property, Plant and Equipment, Useful Life		5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life		16 years
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| DePuy Mitek Inc [Member]
Concentration Risk, Percentage		70.00%	75.00%
DePuy Mitek Inc [Member]
Revenues From Agreements as Percent of Total Revenue		71.00%	73.00%	73.00%

The percent of total revenue that revenue from agreements comprises.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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