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Note 5 - Income (Loss) Per Share (Details) - Calculation of Basic and Diluted Net Income (Loss) Per Common Share (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Basic and dilutive numerator:        
Net income (loss) (in Dollars) $ (5,379) $ (159) $ (8,178) $ 10,033
Denominator:        
Common shares outstanding 44,642 38,707 41,058 38,699
Contingently issuable shares - vested DSUs 2 2 2 9
Weighted-average common shares outstanding—basic 44,644 38,709 41,060 38,708
Net effect of dilutive securities:        
Stock options       63
Contingently issuable shares – nonvested DSUs       77
Weighted-average common shares outstanding—diluted 44,644 38,709 41,060 38,848
Net income (loss) per common share—basic (in Dollars per share) $ (0.12) $ 0.00 $ (0.20) $ 0.26
Net income (loss) per common share—diluted (in Dollars per share) $ (0.12) $ 0.00 $ (0.20) $ 0.26