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Note 8 - Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Three Months Ended
March 31,
 
 
2017
 
2016
Net income
 
$
1,442
 
 
$
4,560
 
 
 
 
 
 
 
 
 
 
Weighted average common shares outstanding-basic
 
 
83,617
 
 
 
84,033
 
Plus: net effect of dilutive stock options and restricted stock units
 
 
1,963
 
 
 
446
 
Weighted average common shares outstanding-diluted
 
 
85,580
 
 
 
84,479
 
Net income per common share-basic
 
$
0.02
 
 
$
0.05
 
Net income per common share-diluted
 
$
0.02
 
 
$
0.05