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Basic and Diluted Net Income Per Share
9 Months Ended
Sep. 30, 2017
Earnings Per Share, Basic and Diluted [Abstract]  
Earnings Per Share [Text Block]
4.
Basic and Diluted Net Income Per Share
 
Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common equivalent shares outstanding during the period. The number of dilutive common equivalent shares outstanding during the period was determined in accordance with the treasury-stock method. Common equivalent shares consisted of common stock issuable upon the exercise of outstanding options and common stock issuable upon the vesting of outstanding, unvested SUAs. Basic and diluted weighted average common shares outstanding for the three and nine months ended September 30, 2017 and 2016 are as follows:
 
 
 
Three Months Ended
 
Nine Months Ended
 
 
 
September 30,
 
September 30,
 
September 30,
 
September 30,
 
 
 
2017
 
2016
 
2017
 
2016
 
Weighted average common shares outstanding, basic
 
 
5,491
 
 
5,460
 
 
5,476
 
 
5,442
 
Dilutive common equivalent shares
 
 
73
 
 
50
 
 
64
 
 
15
 
Weighted average common shares outstanding, diluted
 
 
5,564
 
 
5,510
 
 
5,540
 
 
5,457