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Note 2 - Summary of Significant Accounting Policies - Summary of Operating Results for Company's Discontinued Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Net sales |  |  | $ 22,225
Cost of sales |  |  | 23,881
Gross loss |  |  | (1,656)
Selling, general and administrative expense |  |  | 396
Operating loss |  |  | (2,052)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  | (13,497)
Interest expense |  |  | (99)
Loss before income taxes |  |  | (15,648)
Income tax benefit |  |  | (3,934)
Loss on discontinued operations |  |  | $ (11,714)

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