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Net Income per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 855,000	$ 1,029,000	$ 4,704,000	$ 5,379,000
Weighted average common shares outstanding — basic	7,711,000	7,635,000	7,683,000	7,616,000
Weighted Average Number Diluted Shares Outstanding Adjustment	46,000	32,000	56,000	33,000
Weighted average common and potentially issuable common shares outstanding — diluted	7,757,000	7,667,000	7,739,000	7,649,000
Basic net income per common share (USD per share)	$ 0.11	$ 0.13	$ 0.61	$ 0.71
Diluted net income per common share (USD per share)	0.11	0.13	0.61	0.70
Common Stock, Dividends, Per Share, Cash Paid	$ 0.05	$ 0.00	$ 0.05	$ 0.00

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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