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Note 11 - Earnings (Loss) Per Share - Summary of Reconciliations Between the Numerator and the Denominator of the Basic and Diluted Earnings Per Share Computations (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Effect of dilutive securities on net income $ 0  
Shares - dilutive securities (in shares) 34  
Net Income - diluted $ 501  
Diluted (in shares) 5,719 5,633
Diluted (in dollars per share) $ 0.09 $ (0.12)
Net Income - basic $ 501 $ (691)
Basic (in shares) 5,685 5,633
Basic (in dollars per share) $ 0.09 $ (0.12)
Shares (in shares)   5,633
Per Share Amount (in dollars per share)   $ (0.12)