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Note 10 - Income (Loss) Per Share - Income (Loss) Per Basic and Diluted Weighted Average Common Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Income (loss) from continuing operations $ (1,587) $ 1,420 $ (6,550) $ (13,568)
Loss from discontinued operations (482) (693) (1,455) (1,529)
Net income (loss) $ (2,069) $ 727 $ (8,005) $ (15,097)
Basic weighted-average common shares outstanding (in shares) 9,620 9,597 9,611 9,583
Effect of potentially dilutive common shares (in shares) [1] 23
Diluted weighted-average common shares outstanding (in shares) 9,620 9,620 9,611 9,583
Continuing operations (in dollars per share) $ (0.16) $ 0.15 $ (0.68) $ (1.42)
Discontinued operations (in dollars per share) (0.05) (0.07) (0.15) (0.16)
Net income (loss) per share (in dollars per share) (0.21) 0.08 (0.83) (1.58)
Continuing operations (in dollars per share) (0.16) 0.15 (0.68) (1.42)
Discontinued operations (in dollars per share) (0.05) (0.07) (0.15) (0.16)
Net income (loss) per share assuming dilution (in dollars per share) $ (0.21) $ 0.08 $ (0.83) $ (1.58)
[1] Due to the Company's net loss in the three and nine months ended September 30, 2017 and the nine months ended September 30, 2016, the assumed exercise of stock options and the vesting of restricted stock units and performance share awards using the treasury stock method would have had an antidilutive effect and were therefore excluded from the computation of diluted loss per share. The weighted average number of such antidilutive shares not included in the computation of diluted loss per share was approximately 194,000 and 195,000 for the three and nine months ended September 30, 2017, respectively, and approximately 181,000 for the nine months ended September 30, 2016.