Quarterly report pursuant to Section 13 or 15(d)

Nature of Operations and Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Details)

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Nature of Operations and Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Net income $ 1,603,959 $ 616,980 $ 2,534,491 $ 2,031,887
Weighted average common shares outstanding - basic (in shares) 14,033,535 13,846,045 13,968,635 13,798,593
Effect of dilutive securities:        
Unvested restricted stock and stock options (in shares) 559,572 680,493 554,694 643,610
Weighted average common shares outstanding - diluted (in shares) 14,593,107 14,526,538 14,523,329 14,442,203
Basic earnings per share (in dollars per share) $ 0.11 $ 0.04 $ 0.18 $ 0.15
Diluted earnings per share (in dollars per share) $ 0.11 $ 0.04 $ 0.17 $ 0.14
Unvested restricted stock        
Effect of dilutive securities:        
Weighted average potentially dilutive securities (in shares) 0 0 0 0
Stock options        
Effect of dilutive securities:        
Weighted average potentially dilutive securities (in shares) 112,768 2,815 133,194 49,367