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Note 10 - Taxes - Tax Examinations (Details) | 12 Months Ended
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Dec. 31, 2020
Domestic Tax Authority [Member] |
Open tax year | 2017
State and Local Jurisdiction [Member] |
Open tax year | 2016
Foreign Tax Authority [Member] | Departamento de Hacienda de Puerto Rico [Member] |
Open tax year | 2015
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |
Open tax year | 2015

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