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Note 4 - Property and Equipment - Depreciation of Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Depreciation of property and equipment $ 8,961 $ 5,722 [1] $ 3,727
[1] The Company has initially applied ASC 2014-09 (Topic 606) on January 1, 2018 and ASC 2016-02 (Topic 842) on January 1, 2019. Both accounting standards were adopted using the modified retrospective method, under this method the comparative periods were not restated.