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Note 2 - Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Noncurrent assets from discontinued operations	$ 209	$ 409
Transport Financial Services [Member]
Discontinued Operation, Tax Effect of Discontinued Operation	200	200	$ 200
Transport Financial Services [Member] | Discontinued Operations, Disposed of by Sale [Member]
Operating expenses	0	0	0
(Reversal of) loss contingency	(800)	(800)	(1,000)
Operating income	800	800	1,000
Income before income taxes	800	800	1,000
Discontinued Operation, Tax Effect of Discontinued Operation	200	200	250
Net income from discontinued operations, net of tax	600	600	$ 750
Noncurrent deferred tax asset	209	409
Noncurrent assets from discontinued operations	209	409
Total assets from discontinued operations	209	409
Noncurrent contingent liabilities	835	1,635
Total liabilities from discontinued operations	$ 835	$ 1,635

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