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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
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)