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Note 3 - Significant Accounting Policies - Basic and Diluted Earnings (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Net (loss) income attributable to common stockholders $ (467) $ 124 $ (521) $ (3,506)
Less: income attributable to participating securities (83) (69) (152) (131)
Subtotal $ (550) $ 55 $ (673) $ (3,637)
Weighted average common shares outstanding (in shares) 17,815 17,813 17,814 17,813
Basic and diluted net loss per share attributable to common stockholders (in dollars per share) $ (0.03) $ 0 $ (0.04) $ (0.20)