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Note 4 - Discontinued Operations - Summary of Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Earnings (loss) from discontinued operations (1)         $ 0 $ 88
Discontinued operations, net of $0 income taxes $ 0 $ 0 $ 14 $ 73 $ 0 88
LCD Monitor [Member]            
Net sales           0
Earnings (loss) from discontinued operations (1)           88
Loss on sale of assets           0
Discontinued operations, net of $0 income taxes           $ 88