Note 13 - Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues	$ 697	$ 951	$ 2,014	$ 2,439
Operating costs and expenses	(722)	(745)	(2,098)	(2,039)
Deprectiation expense		(72)		(213)
Income (loss) from discontinued operations	$ (25)	$ 134	$ (84)	$ 187

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