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Note 7 - Other Income, Net - Components of Other (Income) Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Loss (gain) on investments | $ 271 | $ (109)
Fair value adjustment on DPP (note 16) | 142 | 465
Other | (400) | (144)
Other income, net | $ 13 | $ 212

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