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Note 8 - Income Taxes - Provision for Income Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax	$ 3,570	$ 0	$ 0
Deferred income tax	0	0	0
Income tax expenses	$ 3,570	$ (0)	$ (0)

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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