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Net Income per Common Share (Tables)
6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Computation of basic and diluted net income per common share:
The computation of basic and diluted net income (loss) per common share is as follows:

 
Three months ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2019
 
2018
 
2019
 
2018
Net income (loss)
$
209,000

 
$
445,000

 
$
(3,636,000
)
 
$
963,000

 
 
 
 
 
 
 
 
Weighted average common shares outstanding — basic
7,822,000

 
7,743,000

 
7,786,000

 
7,727,000

Effect of dilutive securities
42,000

 
57,000

 

 
73,000

Weighted average common and potentially issuable common shares outstanding — diluted
7,864,000

 
7,800,000

 
7,786,000

 
7,800,000

 
 
 
 
 
 
 
 
Basic net income (loss) per common share
$
0.03

 
$
0.06

 
$
(0.47
)
 
$
0.12

Diluted net income (loss) per common share
$
0.03

 
$
0.06

 
$
(0.47
)
 
$
0.12