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Note 2 - Discontinued Operations - Operating Results for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales				$ 9
Cost of sales		618		1,012
Gross loss		(618)		(1,003)
Selling, general and administrative expense
Operating loss		(618)		(1,003)
Interest expense
Loss before income taxes		(618)		(1,003)
Income tax expense (benefit)		29		(30)
Net loss		$ (647)		$ (973)

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