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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% |  |

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