Note 13 - Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating revenues	$ 577	$ 821	$ 1,317	$ 1,488
Operating costs and expenses	(719)	(686)	(1,376)	(1,294)
Deprectiation expense		(71)		(142)
Income (loss) from discontinued operations	$ (142)	$ 64	$ (59)	$ 52

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