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Note 12 - Net Income (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, 2019
Mar. 31, 2018
Net income (loss) $ 2,165 $ (1,951)
Basic weighted-average common shares outstanding (in shares) 9,735 9,707
Effect of potentially dilutive common shares(1) (in shares) [1]
Diluted weighted-average common shares outstanding (in shares) 9,735 9,707
Basic (in dollars per share) $ 0.22 $ (0.20)
Diluted (in dollars per share) $ 0.22 $ (0.20)
[1] The weighted-average number of antidilutive shares not included in the computation of diluted net income per share was 24,000 for the three months ended March 31, 2019. The weighted-average number of antidilutive shares not included in the computation of diluted net loss per share was approximately 87,000 for the three months ended March 31, 2018, including approximately 34,000 of performance-based share awards, at the target level of 100%, that were not included because the performance conditions had not been met as of March 31, 2018.