Net Income per Common Share (Tables)

12 Months Ended

Dec. 31, 2018

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:

	December 31,
	2018			2017		2016
Net income (loss)	$	(4,782,000	)	$	5,459,000	$	7,411,000
Weighted average common shares outstanding — basic	7,750,000			7,690,000		7,621,000
Effect of dilutive securities	—			57,000		40,000
Weighted average common and potentially issuable common shares outstanding — diluted	7,750,000			7,747,000		7,661,000
Basic net income (loss) per common share	$	(0.62	)	$	0.71	$	0.97
Diluted net income (loss) per common share	$	(0.62	)	$	0.70	$	0.97