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Net Income per Common Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Earnings Per Share [Abstract]        
Net income $ 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
Weighted Average Number Diluted Shares Outstanding Adjustment 42,000 57,000 0 73,000
Weighted average common and potentially issuable common shares outstanding — diluted 7,864,000 7,800,000 7,786,000 7,800,000
Earnings Per Share, Basic $ 0.03 $ 0.06 $ (0.47) $ 0.12
Earnings Per Share, Diluted $ 0.03 $ 0.06 $ (0.47) $ 0.12