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Net Income per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 445,000	$ 2,162,000	$ 963,000	$ 3,848,000
Weighted average common shares outstanding — basic	7,743,000	7,687,000	7,727,000	7,669,000
Weighted Average Number Diluted Shares Outstanding Adjustment	57,000	65,000	73,000	61,000
Weighted average common and potentially issuable common shares outstanding — diluted	7,800,000	7,752,000	7,800,000	7,730,000
Earnings Per Share, Basic	$ 0.06	$ 0.28	$ 0.12	$ 0.50
Earnings Per Share, Diluted	$ 0.06	$ 0.28	$ 0.12	$ 0.50

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