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Note 11 - Net Loss Per Share - Net Loss Per Basic and Diluted Weighted Average Common Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Loss from continuing operations $ (1,951) $ (3,542)
Loss on discontinued operations (326)
Net loss $ (1,951) $ (3,868)
Basic weighted-average common shares outstanding (in shares) 9,707 9,604
Effect of potentially dilutive common shares (in shares) [1]
Diluted weighted-average common shares outstanding (in shares) 9,707 9,604
Continuing operations (in dollars per share) $ (0.20) $ (0.37)
Discontinued operations (in dollars per share) (0.03)
Net loss per share (in dollars per share) $ (0.20) $ (0.40)
[1] The weighted-average number of such antidilutive shares not included in the computation of diluted loss per share was approximately 87,000 and 196,000 for the three months ended March 31, 2018 and 2017, respectively, including approximately 34,000 performance-based share awards, at the target level of 100%, for the three months ended March 31, 2018 that were not included because the performance conditions had not been met as of March 31, 2018.