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Net Income per Common Share (Tables)
3 Months Ended
Mar. 31, 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
 
March 31,
 
2019
 
2018
Net income (loss)
$
(3,845,000
)
 
$
518,000

 
 
 
 
Weighted average common shares outstanding — basic
7,779,000

 
7,711,000

Effect of dilutive securities

 
89,000

Weighted average common and potentially issuable common shares outstanding — diluted
7,779,000

 
7,800,000

 
 
 
 
Basic net income (loss) per common share
$
(0.49
)
 
$
0.07

Diluted net income (loss) per common share
$
(0.49
)
 
$
0.07