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Note 12 - 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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Loss from continuing operations $ (5,686) $ (1,421) $ (7,637) $ (4,963)
Loss on discontinued operations (647) (973)
Net loss $ (5,686) $ (2,068) $ (7,637) $ (5,936)
Basic weighted-average common shares outstanding (in shares) 9,727 9,610 9,717 9,607
Effect of potentially dilutive common shares(1) (in shares) [1]
Diluted weighted-average common shares outstanding (in shares) 9,727 9,610 9,717 9,607
Continuing operations (in dollars per share) $ (0.59) $ (0.15) $ (0.79) $ (0.52)
Discontinued operations (in dollars per share) (0.07) (0.10)
Net loss per share (in dollars per share) $ (0.59) $ (0.22) $ (0.79) $ (0.62)
[1] The weighted-average number of such antidilutive shares not included in the computation of diluted loss per share for the three and six months ended June 30, 2018 was approximately 64,000 and 75,000, respectively, including approximately 40,000 and 37,000, respectively, 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 June 30, 2018. The weighted-average number of such antidilutive shares not included in the computation of diluted loss per share for the three and six months ended June 30, 2017 was approximately 195,000 and 196,000, respectively.