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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Goodwill, Impairment Loss |  | $ 0 |  |  |
Impairment of Long-Lived Assets Held-for-use |  | 0 |  |  |
Operating Lease, Liability, Total |  | 10,648 |  |  |
Operating Lease, Right-of-Use Asset |  | 8,463 |  |  |
Long-term Debt, Current Maturities, Total |  | 3,200 |  |  | 2,400
Long-term Debt, Excluding Current Maturities, Total |  | $ 46,917 |  |  | $ 54,813
Iimmaterial Misclassification Understated Current Portion, Long Term Debt and Overstated Long Term Debt [Member] |  |  |  |  |
Long-term Debt, Current Maturities, Total |  |  | $ 4,000 |  |
Long-term Debt, Excluding Current Maturities, Total |  |  | $ (4,000) |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Operating Lease, Liability, Total |  |  |  | $ 11,700 |
Operating Lease, Right-of-Use Asset |  |  |  | $ 9,400 |
Existing Technology [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | [1] | 6 years 36 days |  |  |
Trade Names [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | [1] | 6 years 292 days |  |  |
Minimum [Member] |  |  |  |  |
Customer Payments Term |  | 0 years |  |  |
Minimum [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  | 1 year |  |  |
Minimum [Member] | Existing Technology [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 7 years |  |  |
Minimum [Member] | Trade Names [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |  |  |
Minimum [Member] | Distribution Rights [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 4 years |  |  |
Minimum [Member] | In Process Research and Development [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 5 years |  |  |
Minimum [Member] | Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 5 years |  |  |
Maximum [Member] |  |  |  |  |
Customer Payments Term |  | 60 days |  |  |
Maximum [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  | 4 years |  |  |
Maximum [Member] | Existing Technology [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |  |
Maximum [Member] | Trade Names [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |  |
Maximum [Member] | Distribution Rights [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 5 years |  |  |
Maximum [Member] | In Process Research and Development [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |  |
Maximum [Member] | Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 15 years |  |  |
[1] | Weighted average life as of December 31, 2019.

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