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Note 4 - Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Noncurrent assets from discontinued operations	$ 259		$ 259		$ 409
Transport Financial Services [Member] | Discontinued Operations, Disposed of by Sale [Member]
Reversal of contingent loss liability	(200)	$ (200)	(600)	$ (600)
Income before income taxes	200	200	600	600
Income tax expense	50	50	150	150
Income from discontinued operations, net of tax	150	$ 150	450	$ 450
Noncurrent deferred tax asset	259		259		409
Noncurrent assets from discontinued operations	259		259		409
Total assets from discontinued operations	259		259		409
Long-term contingent loss liability	1,035		1,035		1,635
Long-term liabilities of discontinued operations	1,035		1,035		1,635
Total liabilities from discontinued operations	$ 1,035		$ 1,035		$ 1,635

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