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Note 11 - Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Three Months Ended

June 30,
 
Six Months Ended

June 30,
 
 
2018
 
2017
 
2018
 
2017
Net income
 
$
(3,367
)
 
$
6,517
 
 
$
3,024
 
 
$
7,959
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average common shares outstanding-basic
 
 
83,231
 
 
 
83,921
 
 
 
83,222
 
 
 
83,708
 
Plus: net effect of dilutive stock options and restricted stock units
 
 
-
 
 
 
1,905
 
 
 
1,615
 
 
 
1,826
 
Weighted average common shares outstanding-diluted
 
 
83,231
 
 
 
85,826
 
 
 
84,837
 
 
 
85,534
 
Net (loss)/income per common share-basic
 
$
(0.04
)
 
$
0.08
 
 
$
0.04
 
 
$
0.10
 
Net (loss)/income per common share-diluted
 
$
(0.04
)
 
$
0.08
 
 
$
0.04
 
 
$
0.09