Note 9 - Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Operating revenues	$ 2,646	$ 3,125
Operating costs and expenses	(2,787)	(2,585)
Depreciation expense		(283)
Impairment loss	(196)	(3,614)
Loss from discontinued operations	$ (337)	$ (3,357)

Amount of loss from loss from classification to held for sale from a discontinued operation attributable to the parent.

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Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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