Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Net Income Per Common Share (Details)

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Summary of Significant Accounting Policies - Net Income Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Numerator:                    
Net income $ 2,022 $ 1,445 $ 1,857 $ 1,463 $ 1,739 $ 1,318 $ (1,117) $ 1,598 $ 6,787 $ 3,538
Less distributed and undistributed income allocated to participating securities                 130 118
Net income attributable to common shareholders                 $ 6,657 $ 3,420
Denominator:                    
Weighted average common shares (Basic)                 4,421 4,358
Weighted average common shares including assumed conversions (Diluted)                 4,421 4,358
Basic net income per common share (in dollars per share) $ 0.45 $ 0.32 $ 0.42 $ 0.32 $ 0.39 $ 0.29 $ (0.25) $ 0.36 $ 1.51 $ 0.78
Diluted net income per common share (in dollars per share) $ 0.45 $ 0.32 $ 0.42 $ 0.32 $ 0.39 $ 0.29 $ (0.25) $ 0.36 $ 1.51 $ 0.78